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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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9b5bc5199e
We can simply truncate the caps, as 'othercaps' is the result of intersect operations and thus ours and writable.
2586 lines
81 KiB
C
2586 lines
81 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2005 Wim Taymans <wim@fluendo.com>
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* 2005 Andy Wingo <wingo@fluendo.com>
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* 2005 Thomas Vander Stichele <thomas at apestaart dot org>
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* 2008 Wim Taymans <wim.taymans@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:gstbasetransform
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* @short_description: Base class for simple transform filters
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* @see_also: #GstBaseSrc, #GstBaseSink
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*
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* This base class is for filter elements that process data.
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*
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* It provides for:
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* <itemizedlist>
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* <listitem><para>one sinkpad and one srcpad</para></listitem>
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* <listitem><para>
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* Possible formats on sink and source pad implemented
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* with custom transform_caps function. By default uses
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* same format on sink and source.
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* </para></listitem>
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* <listitem><para>Handles state changes</para></listitem>
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* <listitem><para>Does flushing</para></listitem>
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* <listitem><para>Push mode</para></listitem>
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* <listitem><para>
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* Pull mode if the sub-class transform can operate on arbitrary data
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* </para></listitem>
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* </itemizedlist>
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*
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* <refsect2>
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* <title>Use Cases</title>
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* <para>
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* <orderedlist>
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* <listitem>
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* <itemizedlist><title>Passthrough mode</title>
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* <listitem><para>
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* Element has no interest in modifying the buffer. It may want to inspect it,
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* in which case the element should have a transform_ip function. If there
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* is no transform_ip function in passthrough mode, the buffer is pushed
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* intact.
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* </para></listitem>
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* <listitem><para>
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* On the GstBaseTransformClass is the passthrough_on_same_caps variable
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* which will automatically set/unset passthrough based on whether the
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* element negotiates the same caps on both pads.
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* </para></listitem>
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* <listitem><para>
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* passthrough_on_same_caps on an element that doesn't implement a
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* transform_caps function is useful for elements that only inspect data
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* (such as level)
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* </para></listitem>
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* </itemizedlist>
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* <itemizedlist>
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* <title>Example elements</title>
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* <listitem>Level</listitem>
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* <listitem>Videoscale, audioconvert, ffmpegcolorspace, audioresample in
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* certain modes.</listitem>
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* </itemizedlist>
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* </listitem>
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* <listitem>
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* <itemizedlist>
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* <title>Modifications in-place - input buffer and output buffer are the
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* same thing.</title>
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* <listitem><para>
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* The element must implement a transform_ip function.
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* </para></listitem>
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* <listitem><para>
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* Output buffer size must <= input buffer size
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* </para></listitem>
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* <listitem><para>
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* If the always_in_place flag is set, non-writable buffers will be copied
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* and passed to the transform_ip function, otherwise a new buffer will be
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* created and the transform function called.
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* </para></listitem>
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* <listitem><para>
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* Incoming writable buffers will be passed to the transform_ip function
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* immediately. </para></listitem>
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* <listitem><para>
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* only implementing transform_ip and not transform implies always_in_place
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* = TRUE
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* </para></listitem>
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* </itemizedlist>
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* <itemizedlist>
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* <title>Example elements</title>
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* <listitem>Volume</listitem>
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* <listitem>Audioconvert in certain modes (signed/unsigned
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* conversion)</listitem>
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* <listitem>ffmpegcolorspace in certain modes (endianness
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* swapping)</listitem>
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* </itemizedlist>
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* </listitem>
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* <listitem>
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* <itemizedlist>
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* <title>Modifications only to the caps/metadata of a buffer</title>
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* <listitem><para>
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* The element does not require writable data, but non-writable buffers
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* should be subbuffered so that the meta-information can be replaced.
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* </para></listitem>
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* <listitem><para>
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* Elements wishing to operate in this mode should replace the
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* prepare_output_buffer method to create subbuffers of the input buffer
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* and set always_in_place to TRUE
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* </para></listitem>
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* </itemizedlist>
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* <itemizedlist>
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* <title>Example elements</title>
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* <listitem>Capsfilter when setting caps on outgoing buffers that have
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* none.</listitem>
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* <listitem>identity when it is going to re-timestamp buffers by
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* datarate.</listitem>
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* </itemizedlist>
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* </listitem>
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* <listitem>
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* <itemizedlist><title>Normal mode</title>
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* <listitem><para>
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* always_in_place flag is not set, or there is no transform_ip function
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* </para></listitem>
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* <listitem><para>
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* Element will receive an input buffer and output buffer to operate on.
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* </para></listitem>
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* <listitem><para>
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* Output buffer is allocated by calling the prepare_output_buffer function.
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* </para></listitem>
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* </itemizedlist>
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* <itemizedlist>
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* <title>Example elements</title>
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* <listitem>Videoscale, ffmpegcolorspace, audioconvert when doing
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* scaling/conversions</listitem>
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* </itemizedlist>
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* </listitem>
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* <listitem>
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* <itemizedlist><title>Special output buffer allocations</title>
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* <listitem><para>
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* Elements which need to do special allocation of their output buffers
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* other than what gst_buffer_pad_alloc allows should implement a
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* prepare_output_buffer method, which calls the parent implementation and
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* passes the newly allocated buffer.
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* </para></listitem>
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* </itemizedlist>
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* <itemizedlist>
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* <title>Example elements</title>
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* <listitem>efence</listitem>
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* </itemizedlist>
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* </listitem>
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* </orderedlist>
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* </para>
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* </refsect2>
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* <refsect2>
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* <title>Sub-class settable flags on GstBaseTransform</title>
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* <para>
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* <itemizedlist>
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* <listitem><para>
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* <itemizedlist><title>passthrough</title>
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* <listitem><para>
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* Implies that in the current configuration, the sub-class is not
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* interested in modifying the buffers.
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* </para></listitem>
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* <listitem><para>
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* Elements which are always in passthrough mode whenever the same caps
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* has been negotiated on both pads can set the class variable
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* passthrough_on_same_caps to have this behaviour automatically.
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* </para></listitem>
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* </itemizedlist>
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* </para></listitem>
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* <listitem><para>
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* <itemizedlist><title>always_in_place</title>
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* <listitem><para>
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* Determines whether a non-writable buffer will be copied before passing
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* to the transform_ip function.
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* </para></listitem>
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* <listitem><para>
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* Implied TRUE if no transform function is implemented.
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* </para></listitem>
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* <listitem><para>
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* Implied FALSE if ONLY transform function is implemented.
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* </para></listitem>
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* </itemizedlist>
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* </para></listitem>
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* </itemizedlist>
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* </para>
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* </refsect2>
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdlib.h>
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#include <string.h>
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#include "../../../gst/gst_private.h"
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#include "../../../gst/gst-i18n-lib.h"
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#include "gstbasetransform.h"
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#include <gst/gstmarshal.h>
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GST_DEBUG_CATEGORY_STATIC (gst_base_transform_debug);
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#define GST_CAT_DEFAULT gst_base_transform_debug
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/* BaseTransform signals and args */
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enum
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{
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/* FILL ME */
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LAST_SIGNAL
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};
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#define DEFAULT_PROP_QOS FALSE
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enum
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{
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PROP_0,
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PROP_QOS
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};
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#define GST_BASE_TRANSFORM_GET_PRIVATE(obj) \
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(G_TYPE_INSTANCE_GET_PRIVATE ((obj), GST_TYPE_BASE_TRANSFORM, GstBaseTransformPrivate))
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struct _GstBaseTransformPrivate
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{
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/* QoS *//* with LOCK */
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gboolean qos_enabled;
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gdouble proportion;
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GstClockTime earliest_time;
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/* previous buffer had a discont */
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gboolean discont;
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GstActivateMode pad_mode;
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gboolean gap_aware;
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/* caps used for allocating buffers */
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gboolean proxy_alloc;
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GstCaps *sink_alloc;
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GstCaps *src_alloc;
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/* upstream caps and size suggestions */
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GstCaps *sink_suggest;
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guint size_suggest;
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gboolean suggest_pending;
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gboolean reconfigure;
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/* QoS stats */
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guint64 processed;
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guint64 dropped;
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};
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static GstElementClass *parent_class = NULL;
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static void gst_base_transform_class_init (GstBaseTransformClass * klass);
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static void gst_base_transform_init (GstBaseTransform * trans,
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GstBaseTransformClass * klass);
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static GstFlowReturn gst_base_transform_prepare_output_buffer (GstBaseTransform
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* trans, GstBuffer * input, GstBuffer ** buf);
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GType
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gst_base_transform_get_type (void)
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{
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static volatile gsize base_transform_type = 0;
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if (g_once_init_enter (&base_transform_type)) {
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GType _type;
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static const GTypeInfo base_transform_info = {
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sizeof (GstBaseTransformClass),
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NULL,
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NULL,
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(GClassInitFunc) gst_base_transform_class_init,
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NULL,
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NULL,
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sizeof (GstBaseTransform),
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0,
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(GInstanceInitFunc) gst_base_transform_init,
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};
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_type = g_type_register_static (GST_TYPE_ELEMENT,
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"GstBaseTransform", &base_transform_info, G_TYPE_FLAG_ABSTRACT);
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g_once_init_leave (&base_transform_type, _type);
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}
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return base_transform_type;
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}
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static void gst_base_transform_finalize (GObject * object);
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static void gst_base_transform_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_base_transform_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static gboolean gst_base_transform_src_activate_pull (GstPad * pad,
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gboolean active);
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static gboolean gst_base_transform_sink_activate_push (GstPad * pad,
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gboolean active);
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static gboolean gst_base_transform_activate (GstBaseTransform * trans,
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gboolean active);
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static gboolean gst_base_transform_get_unit_size (GstBaseTransform * trans,
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GstCaps * caps, guint * size);
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static gboolean gst_base_transform_src_event (GstPad * pad, GstEvent * event);
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static gboolean gst_base_transform_src_eventfunc (GstBaseTransform * trans,
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GstEvent * event);
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static gboolean gst_base_transform_sink_event (GstPad * pad, GstEvent * event);
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static gboolean gst_base_transform_sink_eventfunc (GstBaseTransform * trans,
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GstEvent * event);
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static gboolean gst_base_transform_check_get_range (GstPad * pad);
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static GstFlowReturn gst_base_transform_getrange (GstPad * pad, guint64 offset,
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guint length, GstBuffer ** buffer);
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static GstFlowReturn gst_base_transform_chain (GstPad * pad,
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GstBuffer * buffer);
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static GstCaps *gst_base_transform_getcaps (GstPad * pad);
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static gboolean gst_base_transform_acceptcaps (GstPad * pad, GstCaps * caps);
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static gboolean gst_base_transform_setcaps (GstPad * pad, GstCaps * caps);
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static GstFlowReturn gst_base_transform_buffer_alloc (GstPad * pad,
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guint64 offset, guint size, GstCaps * caps, GstBuffer ** buf);
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/* static guint gst_base_transform_signals[LAST_SIGNAL] = { 0 }; */
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static void
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gst_base_transform_finalize (GObject * object)
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{
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GstBaseTransform *trans;
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trans = GST_BASE_TRANSFORM (object);
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gst_caps_replace (&trans->priv->sink_suggest, NULL);
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g_mutex_free (trans->transform_lock);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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gst_base_transform_class_init (GstBaseTransformClass * klass)
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{
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GObjectClass *gobject_class;
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gobject_class = G_OBJECT_CLASS (klass);
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GST_DEBUG_CATEGORY_INIT (gst_base_transform_debug, "basetransform", 0,
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"basetransform element");
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GST_DEBUG ("gst_base_transform_class_init");
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g_type_class_add_private (klass, sizeof (GstBaseTransformPrivate));
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parent_class = g_type_class_peek_parent (klass);
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gobject_class->set_property = gst_base_transform_set_property;
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gobject_class->get_property = gst_base_transform_get_property;
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g_object_class_install_property (gobject_class, PROP_QOS,
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g_param_spec_boolean ("qos", "QoS", "Handle Quality-of-Service events",
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DEFAULT_PROP_QOS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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gobject_class->finalize = gst_base_transform_finalize;
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klass->passthrough_on_same_caps = FALSE;
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klass->event = GST_DEBUG_FUNCPTR (gst_base_transform_sink_eventfunc);
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klass->src_event = GST_DEBUG_FUNCPTR (gst_base_transform_src_eventfunc);
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}
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static void
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gst_base_transform_init (GstBaseTransform * trans,
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GstBaseTransformClass * bclass)
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{
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GstPadTemplate *pad_template;
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GST_DEBUG ("gst_base_transform_init");
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trans->priv = GST_BASE_TRANSFORM_GET_PRIVATE (trans);
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pad_template =
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gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "sink");
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g_return_if_fail (pad_template != NULL);
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trans->sinkpad = gst_pad_new_from_template (pad_template, "sink");
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gst_pad_set_getcaps_function (trans->sinkpad,
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GST_DEBUG_FUNCPTR (gst_base_transform_getcaps));
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gst_pad_set_acceptcaps_function (trans->sinkpad,
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GST_DEBUG_FUNCPTR (gst_base_transform_acceptcaps));
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gst_pad_set_setcaps_function (trans->sinkpad,
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GST_DEBUG_FUNCPTR (gst_base_transform_setcaps));
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gst_pad_set_event_function (trans->sinkpad,
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GST_DEBUG_FUNCPTR (gst_base_transform_sink_event));
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gst_pad_set_chain_function (trans->sinkpad,
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GST_DEBUG_FUNCPTR (gst_base_transform_chain));
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gst_pad_set_activatepush_function (trans->sinkpad,
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GST_DEBUG_FUNCPTR (gst_base_transform_sink_activate_push));
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gst_pad_set_bufferalloc_function (trans->sinkpad,
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GST_DEBUG_FUNCPTR (gst_base_transform_buffer_alloc));
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gst_element_add_pad (GST_ELEMENT (trans), trans->sinkpad);
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pad_template =
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gst_element_class_get_pad_template (GST_ELEMENT_CLASS (bclass), "src");
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g_return_if_fail (pad_template != NULL);
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trans->srcpad = gst_pad_new_from_template (pad_template, "src");
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gst_pad_set_getcaps_function (trans->srcpad,
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GST_DEBUG_FUNCPTR (gst_base_transform_getcaps));
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gst_pad_set_acceptcaps_function (trans->srcpad,
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GST_DEBUG_FUNCPTR (gst_base_transform_acceptcaps));
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gst_pad_set_event_function (trans->srcpad,
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GST_DEBUG_FUNCPTR (gst_base_transform_src_event));
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gst_pad_set_checkgetrange_function (trans->srcpad,
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GST_DEBUG_FUNCPTR (gst_base_transform_check_get_range));
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gst_pad_set_getrange_function (trans->srcpad,
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GST_DEBUG_FUNCPTR (gst_base_transform_getrange));
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gst_pad_set_activatepull_function (trans->srcpad,
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GST_DEBUG_FUNCPTR (gst_base_transform_src_activate_pull));
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gst_element_add_pad (GST_ELEMENT (trans), trans->srcpad);
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trans->transform_lock = g_mutex_new ();
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trans->pending_configure = FALSE;
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trans->priv->qos_enabled = DEFAULT_PROP_QOS;
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trans->cache_caps1 = NULL;
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trans->cache_caps2 = NULL;
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trans->priv->pad_mode = GST_ACTIVATE_NONE;
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trans->priv->gap_aware = FALSE;
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trans->passthrough = FALSE;
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if (bclass->transform == NULL) {
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/* If no transform function, always_in_place is TRUE */
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GST_DEBUG_OBJECT (trans, "setting in_place TRUE");
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trans->always_in_place = TRUE;
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if (bclass->transform_ip == NULL) {
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GST_DEBUG_OBJECT (trans, "setting passthrough TRUE");
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trans->passthrough = TRUE;
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}
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}
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trans->priv->processed = 0;
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trans->priv->dropped = 0;
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}
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/* given @caps on the src or sink pad (given by @direction)
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* calculate the possible caps on the other pad.
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*
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* Returns new caps, unref after usage.
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*/
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static GstCaps *
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gst_base_transform_transform_caps (GstBaseTransform * trans,
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GstPadDirection direction, GstCaps * caps)
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{
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GstCaps *ret;
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GstBaseTransformClass *klass;
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if (caps == NULL)
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return NULL;
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|
|
klass = GST_BASE_TRANSFORM_GET_CLASS (trans);
|
|
|
|
/* if there is a custom transform function, use this */
|
|
if (klass->transform_caps) {
|
|
GstCaps *temp;
|
|
gint i;
|
|
|
|
/* start with empty caps */
|
|
ret = gst_caps_new_empty ();
|
|
GST_DEBUG_OBJECT (trans, "transform caps (direction = %d)", direction);
|
|
|
|
if (gst_caps_is_any (caps)) {
|
|
/* for any caps we still have to call the transform function */
|
|
GST_DEBUG_OBJECT (trans, "from: ANY");
|
|
temp = klass->transform_caps (trans, direction, caps);
|
|
GST_DEBUG_OBJECT (trans, " to: %" GST_PTR_FORMAT, temp);
|
|
|
|
temp = gst_caps_make_writable (temp);
|
|
gst_caps_append (ret, temp);
|
|
} else {
|
|
gint n = gst_caps_get_size (caps);
|
|
/* we send caps with just one structure to the transform
|
|
* function as this is easier for the element */
|
|
for (i = 0; i < n; i++) {
|
|
GstCaps *nth;
|
|
|
|
nth = gst_caps_copy_nth (caps, i);
|
|
GST_LOG_OBJECT (trans, "from[%d]: %" GST_PTR_FORMAT, i, nth);
|
|
temp = klass->transform_caps (trans, direction, nth);
|
|
gst_caps_unref (nth);
|
|
GST_LOG_OBJECT (trans, " to[%d]: %" GST_PTR_FORMAT, i, temp);
|
|
|
|
temp = gst_caps_make_writable (temp);
|
|
|
|
/* here we need to only append those structures, that are not yet
|
|
* in there, we use the merge function for this */
|
|
gst_caps_merge (ret, temp);
|
|
|
|
GST_LOG_OBJECT (trans, " merged[%d]: %" GST_PTR_FORMAT, i, ret);
|
|
}
|
|
GST_LOG_OBJECT (trans, "merged: (%d)", gst_caps_get_size (ret));
|
|
/* FIXME: we can't do much simplification here because we don't really want to
|
|
* change the caps order
|
|
gst_caps_do_simplify (ret);
|
|
GST_DEBUG_OBJECT (trans, "simplified: (%d)", gst_caps_get_size (ret));
|
|
*/
|
|
}
|
|
} else {
|
|
GST_DEBUG_OBJECT (trans, "identity from: %" GST_PTR_FORMAT, caps);
|
|
/* no transform function, use the identity transform */
|
|
ret = gst_caps_ref (caps);
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (trans, "to: (%d) %" GST_PTR_FORMAT, gst_caps_get_size (ret),
|
|
ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* transform a buffer of @size with @caps on the pad with @direction to
|
|
* the size of a buffer with @othercaps and store the result in @othersize
|
|
*
|
|
* We have two ways of doing this:
|
|
* 1) use a custom transform size function, this is for complicated custom
|
|
* cases with no fixed unit_size.
|
|
* 2) use the unit_size functions where there is a relationship between the
|
|
* caps and the size of a buffer.
|
|
*/
|
|
static gboolean
|
|
gst_base_transform_transform_size (GstBaseTransform * trans,
|
|
GstPadDirection direction, GstCaps * caps,
|
|
guint size, GstCaps * othercaps, guint * othersize)
|
|
{
|
|
guint inunitsize, outunitsize, units;
|
|
GstBaseTransformClass *klass;
|
|
gboolean ret;
|
|
|
|
klass = GST_BASE_TRANSFORM_GET_CLASS (trans);
|
|
|
|
GST_DEBUG_OBJECT (trans, "asked to transform size %d for caps %"
|
|
GST_PTR_FORMAT " to size for caps %" GST_PTR_FORMAT " in direction %s",
|
|
size, caps, othercaps, direction == GST_PAD_SRC ? "SRC" : "SINK");
|
|
|
|
if (klass->transform_size) {
|
|
/* if there is a custom transform function, use this */
|
|
ret = klass->transform_size (trans, direction, caps, size, othercaps,
|
|
othersize);
|
|
} else {
|
|
/* there is no transform_size function, we have to use the unit_size
|
|
* functions. This method assumes there is a fixed unit_size associated with
|
|
* each caps. We provide the same amount of units on both sides. */
|
|
if (!gst_base_transform_get_unit_size (trans, caps, &inunitsize))
|
|
goto no_in_size;
|
|
|
|
GST_DEBUG_OBJECT (trans, "input size %d, input unit size %d", size,
|
|
inunitsize);
|
|
|
|
/* input size must be a multiple of the unit_size of the input caps */
|
|
if (inunitsize == 0 || (size % inunitsize != 0))
|
|
goto no_multiple;
|
|
|
|
/* get the amount of units */
|
|
units = size / inunitsize;
|
|
|
|
/* now get the unit size of the output */
|
|
if (!gst_base_transform_get_unit_size (trans, othercaps, &outunitsize))
|
|
goto no_out_size;
|
|
|
|
/* the output size is the unit_size times the amount of units on the
|
|
* input */
|
|
*othersize = units * outunitsize;
|
|
GST_DEBUG_OBJECT (trans, "transformed size to %d", *othersize);
|
|
|
|
ret = TRUE;
|
|
}
|
|
return ret;
|
|
|
|
/* ERRORS */
|
|
no_in_size:
|
|
{
|
|
GST_DEBUG_OBJECT (trans, "could not get in_size");
|
|
g_warning ("%s: could not get in_size", GST_ELEMENT_NAME (trans));
|
|
return FALSE;
|
|
}
|
|
no_multiple:
|
|
{
|
|
GST_DEBUG_OBJECT (trans, "Size %u is not a multiple of unit size %u", size,
|
|
inunitsize);
|
|
g_warning ("%s: size %u is not a multiple of unit size %u",
|
|
GST_ELEMENT_NAME (trans), size, inunitsize);
|
|
return FALSE;
|
|
}
|
|
no_out_size:
|
|
{
|
|
GST_DEBUG_OBJECT (trans, "could not get out_size");
|
|
g_warning ("%s: could not get out_size", GST_ELEMENT_NAME (trans));
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/* get the caps that can be handled by @pad. We perform:
|
|
*
|
|
* - take the caps of peer of otherpad,
|
|
* - filter against the padtemplate of otherpad,
|
|
* - calculate all transforms of remaining caps
|
|
* - filter against template of @pad
|
|
*
|
|
* If there is no peer, we simply return the caps of the padtemplate of pad.
|
|
*/
|
|
static GstCaps *
|
|
gst_base_transform_getcaps (GstPad * pad)
|
|
{
|
|
GstBaseTransform *trans;
|
|
GstPad *otherpad;
|
|
GstCaps *caps;
|
|
|
|
trans = GST_BASE_TRANSFORM (gst_pad_get_parent (pad));
|
|
|
|
otherpad = (pad == trans->srcpad) ? trans->sinkpad : trans->srcpad;
|
|
|
|
/* we can do what the peer can */
|
|
caps = gst_pad_peer_get_caps_reffed (otherpad);
|
|
if (caps) {
|
|
GstCaps *temp;
|
|
const GstCaps *templ;
|
|
|
|
GST_DEBUG_OBJECT (pad, "peer caps %" GST_PTR_FORMAT, caps);
|
|
|
|
/* filtered against our padtemplate on the other side */
|
|
templ = gst_pad_get_pad_template_caps (otherpad);
|
|
GST_DEBUG_OBJECT (pad, "our template %" GST_PTR_FORMAT, templ);
|
|
temp = gst_caps_intersect (caps, templ);
|
|
GST_DEBUG_OBJECT (pad, "intersected %" GST_PTR_FORMAT, temp);
|
|
gst_caps_unref (caps);
|
|
|
|
/* then see what we can transform this to */
|
|
caps = gst_base_transform_transform_caps (trans,
|
|
GST_PAD_DIRECTION (otherpad), temp);
|
|
GST_DEBUG_OBJECT (pad, "transformed %" GST_PTR_FORMAT, caps);
|
|
gst_caps_unref (temp);
|
|
if (caps == NULL)
|
|
goto done;
|
|
|
|
/* and filter against the template of this pad */
|
|
templ = gst_pad_get_pad_template_caps (pad);
|
|
GST_DEBUG_OBJECT (pad, "our template %" GST_PTR_FORMAT, templ);
|
|
temp = gst_caps_intersect (caps, templ);
|
|
GST_DEBUG_OBJECT (pad, "intersected %" GST_PTR_FORMAT, temp);
|
|
gst_caps_unref (caps);
|
|
/* this is what we can do */
|
|
caps = temp;
|
|
} else {
|
|
/* no peer or the peer can do anything, our padtemplate is enough then */
|
|
caps = gst_caps_copy (gst_pad_get_pad_template_caps (pad));
|
|
}
|
|
|
|
done:
|
|
GST_DEBUG_OBJECT (trans, "returning %" GST_PTR_FORMAT, caps);
|
|
|
|
gst_object_unref (trans);
|
|
|
|
return caps;
|
|
}
|
|
|
|
/* function triggered when the in and out caps are negotiated and need
|
|
* to be configured in the subclass. */
|
|
static gboolean
|
|
gst_base_transform_configure_caps (GstBaseTransform * trans, GstCaps * in,
|
|
GstCaps * out)
|
|
{
|
|
gboolean ret = TRUE;
|
|
GstBaseTransformClass *klass;
|
|
|
|
klass = GST_BASE_TRANSFORM_GET_CLASS (trans);
|
|
|
|
GST_DEBUG_OBJECT (trans, "in caps: %" GST_PTR_FORMAT, in);
|
|
GST_DEBUG_OBJECT (trans, "out caps: %" GST_PTR_FORMAT, out);
|
|
|
|
/* clear the cache */
|
|
gst_caps_replace (&trans->cache_caps1, NULL);
|
|
gst_caps_replace (&trans->cache_caps2, NULL);
|
|
|
|
/* figure out same caps state */
|
|
trans->have_same_caps = gst_caps_is_equal (in, out);
|
|
GST_DEBUG_OBJECT (trans, "have_same_caps: %d", trans->have_same_caps);
|
|
|
|
/* If we've a transform_ip method and same input/output caps, set in_place
|
|
* by default. If for some reason the sub-class prefers using a transform
|
|
* function, it can clear the in place flag in the set_caps */
|
|
gst_base_transform_set_in_place (trans,
|
|
klass->transform_ip && trans->have_same_caps);
|
|
|
|
/* Set the passthrough if the class wants passthrough_on_same_caps
|
|
* and we have the same caps on each pad */
|
|
if (klass->passthrough_on_same_caps)
|
|
gst_base_transform_set_passthrough (trans, trans->have_same_caps);
|
|
|
|
/* now configure the element with the caps */
|
|
if (klass->set_caps) {
|
|
GST_DEBUG_OBJECT (trans, "Calling set_caps method to setup caps");
|
|
ret = klass->set_caps (trans, in, out);
|
|
}
|
|
|
|
trans->negotiated = ret;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* check if caps @in on @pad can be transformed to @out on the other pad.
|
|
* We don't have a vmethod to test this yet so we have to do a somewhat less
|
|
* efficient check for this.
|
|
*/
|
|
static gboolean
|
|
gst_base_transform_can_transform (GstBaseTransform * trans, GstPad * pad,
|
|
GstCaps * in, GstCaps * out)
|
|
{
|
|
GstCaps *othercaps;
|
|
|
|
/* convert the in caps to all possible out caps */
|
|
othercaps =
|
|
gst_base_transform_transform_caps (trans, GST_PAD_DIRECTION (pad), in);
|
|
|
|
/* check if transform is empty */
|
|
if (!othercaps || gst_caps_is_empty (othercaps))
|
|
goto no_transform;
|
|
|
|
/* check if the out caps is a subset of the othercaps */
|
|
if (!gst_caps_can_intersect (out, othercaps))
|
|
goto no_subset;
|
|
|
|
if (othercaps)
|
|
gst_caps_unref (othercaps);
|
|
|
|
GST_DEBUG_OBJECT (trans, "from %" GST_PTR_FORMAT, in);
|
|
GST_DEBUG_OBJECT (trans, "to %" GST_PTR_FORMAT, out);
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
no_transform:
|
|
{
|
|
GST_DEBUG_OBJECT (trans,
|
|
"transform returned useless %" GST_PTR_FORMAT, othercaps);
|
|
if (othercaps)
|
|
gst_caps_unref (othercaps);
|
|
return FALSE;
|
|
}
|
|
no_subset:
|
|
{
|
|
GST_DEBUG_OBJECT (trans, "no subset");
|
|
if (othercaps)
|
|
gst_caps_unref (othercaps);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
/* given a fixed @caps on @pad, create the best possible caps for the
|
|
* other pad.
|
|
* @caps must be fixed when calling this function.
|
|
*
|
|
* This function calls the transform caps vmethod of the basetransform to figure
|
|
* out the possible target formats. It then tries to select the best format from
|
|
* this list by:
|
|
*
|
|
* - attempt passthrough if the target caps is a superset of the input caps
|
|
* - fixating by using peer caps
|
|
* - fixating with transform fixate function
|
|
* - fixating with pad fixate functions.
|
|
*
|
|
* this function returns a caps that can be transformed into and is accepted by
|
|
* the peer element.
|
|
*/
|
|
static GstCaps *
|
|
gst_base_transform_find_transform (GstBaseTransform * trans, GstPad * pad,
|
|
GstCaps * caps)
|
|
{
|
|
GstBaseTransformClass *klass;
|
|
GstPad *otherpad, *otherpeer;
|
|
GstCaps *othercaps;
|
|
gboolean peer_checked = FALSE;
|
|
gboolean is_fixed;
|
|
|
|
/* caps must be fixed here, this is a programming error if it's not */
|
|
g_return_val_if_fail (gst_caps_is_fixed (caps), NULL);
|
|
|
|
klass = GST_BASE_TRANSFORM_GET_CLASS (trans);
|
|
|
|
otherpad = (pad == trans->srcpad) ? trans->sinkpad : trans->srcpad;
|
|
otherpeer = gst_pad_get_peer (otherpad);
|
|
|
|
/* see how we can transform the input caps. We need to do this even for
|
|
* passthrough because it might be possible that this element cannot support
|
|
* passthrough at all. */
|
|
othercaps = gst_base_transform_transform_caps (trans,
|
|
GST_PAD_DIRECTION (pad), caps);
|
|
|
|
/* The caps we can actually output is the intersection of the transformed
|
|
* caps with the pad template for the pad */
|
|
if (othercaps) {
|
|
GstCaps *intersect;
|
|
const GstCaps *templ_caps;
|
|
|
|
templ_caps = gst_pad_get_pad_template_caps (otherpad);
|
|
GST_DEBUG_OBJECT (trans,
|
|
"intersecting against padtemplate %" GST_PTR_FORMAT, templ_caps);
|
|
|
|
intersect = gst_caps_intersect (othercaps, templ_caps);
|
|
|
|
gst_caps_unref (othercaps);
|
|
othercaps = intersect;
|
|
}
|
|
|
|
/* check if transform is empty */
|
|
if (!othercaps || gst_caps_is_empty (othercaps))
|
|
goto no_transform;
|
|
|
|
/* if the othercaps are not fixed, we need to fixate them, first attempt
|
|
* is by attempting passthrough if the othercaps are a superset of caps. */
|
|
/* FIXME. maybe the caps is not fixed because it has multiple structures of
|
|
* fixed caps */
|
|
is_fixed = gst_caps_is_fixed (othercaps);
|
|
if (!is_fixed) {
|
|
GST_DEBUG_OBJECT (trans,
|
|
"transform returned non fixed %" GST_PTR_FORMAT, othercaps);
|
|
|
|
/* see if the target caps are a superset of the source caps, in this
|
|
* case we can try to perform passthrough */
|
|
if (gst_caps_can_intersect (othercaps, caps)) {
|
|
GST_DEBUG_OBJECT (trans, "try passthrough with %" GST_PTR_FORMAT, caps);
|
|
if (otherpeer) {
|
|
/* try passthrough. we know it's fixed, because caps is fixed */
|
|
if (gst_pad_accept_caps (otherpeer, caps)) {
|
|
GST_DEBUG_OBJECT (trans, "peer accepted %" GST_PTR_FORMAT, caps);
|
|
/* peer accepted unmodified caps, we free the original non-fixed
|
|
* caps and work with the passthrough caps */
|
|
gst_caps_unref (othercaps);
|
|
othercaps = gst_caps_ref (caps);
|
|
is_fixed = TRUE;
|
|
/* mark that we checked othercaps with the peer, this
|
|
* makes sure we don't call accept_caps again with these same
|
|
* caps */
|
|
peer_checked = TRUE;
|
|
} else {
|
|
GST_DEBUG_OBJECT (trans,
|
|
"peer did not accept %" GST_PTR_FORMAT, caps);
|
|
}
|
|
} else {
|
|
GST_DEBUG_OBJECT (trans, "no peer, doing passthrough");
|
|
gst_caps_unref (othercaps);
|
|
othercaps = gst_caps_ref (caps);
|
|
is_fixed = TRUE;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* second attempt at fixation is done by intersecting with
|
|
* the peer caps */
|
|
if (!is_fixed && otherpeer) {
|
|
/* intersect against what the peer can do */
|
|
GstCaps *peercaps;
|
|
GstCaps *intersect;
|
|
|
|
GST_DEBUG_OBJECT (trans, "othercaps now %" GST_PTR_FORMAT, othercaps);
|
|
|
|
peercaps = gst_pad_get_caps_reffed (otherpeer);
|
|
intersect = gst_caps_intersect (peercaps, othercaps);
|
|
gst_caps_unref (peercaps);
|
|
gst_caps_unref (othercaps);
|
|
othercaps = intersect;
|
|
peer_checked = FALSE;
|
|
|
|
is_fixed = gst_caps_is_fixed (othercaps);
|
|
|
|
GST_DEBUG_OBJECT (trans,
|
|
"filtering against peer yields %" GST_PTR_FORMAT, othercaps);
|
|
}
|
|
|
|
if (gst_caps_is_empty (othercaps))
|
|
goto no_transform_possible;
|
|
|
|
/* third attempt at fixation, call the fixate vmethod and
|
|
* ultimately call the pad fixate function. */
|
|
if (!is_fixed) {
|
|
GST_DEBUG_OBJECT (trans,
|
|
"trying to fixate %" GST_PTR_FORMAT " on pad %s:%s",
|
|
othercaps, GST_DEBUG_PAD_NAME (otherpad));
|
|
|
|
/* since we have no other way to fixate left, we might as well just take
|
|
* the first of the caps list and fixate that */
|
|
|
|
/* FIXME: when fixating using the vmethod, it might make sense to fixate
|
|
* each of the caps; but Wim doesn't see a use case for that yet */
|
|
gst_caps_truncate (othercaps);
|
|
peer_checked = FALSE;
|
|
|
|
if (klass->fixate_caps) {
|
|
GST_DEBUG_OBJECT (trans, "trying to fixate %" GST_PTR_FORMAT
|
|
" using caps %" GST_PTR_FORMAT
|
|
" on pad %s:%s using fixate_caps vmethod", othercaps, caps,
|
|
GST_DEBUG_PAD_NAME (otherpad));
|
|
klass->fixate_caps (trans, GST_PAD_DIRECTION (pad), caps, othercaps);
|
|
is_fixed = gst_caps_is_fixed (othercaps);
|
|
}
|
|
/* if still not fixed, no other option but to let the default pad fixate
|
|
* function do its job */
|
|
if (!is_fixed) {
|
|
GST_DEBUG_OBJECT (trans, "trying to fixate %" GST_PTR_FORMAT
|
|
" on pad %s:%s using gst_pad_fixate_caps", othercaps,
|
|
GST_DEBUG_PAD_NAME (otherpad));
|
|
gst_pad_fixate_caps (otherpad, othercaps);
|
|
is_fixed = gst_caps_is_fixed (othercaps);
|
|
}
|
|
GST_DEBUG_OBJECT (trans, "after fixating %" GST_PTR_FORMAT, othercaps);
|
|
} else {
|
|
GST_DEBUG ("caps are fixed");
|
|
/* else caps are fixed but the subclass may want to add fields */
|
|
if (klass->fixate_caps) {
|
|
othercaps = gst_caps_make_writable (othercaps);
|
|
|
|
GST_DEBUG_OBJECT (trans, "doing fixate %" GST_PTR_FORMAT
|
|
" using caps %" GST_PTR_FORMAT
|
|
" on pad %s:%s using fixate_caps vmethod", othercaps, caps,
|
|
GST_DEBUG_PAD_NAME (otherpad));
|
|
|
|
klass->fixate_caps (trans, GST_PAD_DIRECTION (pad), caps, othercaps);
|
|
is_fixed = gst_caps_is_fixed (othercaps);
|
|
}
|
|
}
|
|
|
|
/* caps should be fixed now, if not we have to fail. */
|
|
if (!is_fixed)
|
|
goto could_not_fixate;
|
|
|
|
/* and peer should accept, don't check again if we already checked the
|
|
* othercaps against the peer. */
|
|
if (!peer_checked && otherpeer && !gst_pad_accept_caps (otherpeer, othercaps))
|
|
goto peer_no_accept;
|
|
|
|
GST_DEBUG_OBJECT (trans, "Input caps were %" GST_PTR_FORMAT
|
|
", and got final caps %" GST_PTR_FORMAT, caps, othercaps);
|
|
|
|
if (otherpeer)
|
|
gst_object_unref (otherpeer);
|
|
|
|
return othercaps;
|
|
|
|
/* ERRORS */
|
|
no_transform:
|
|
{
|
|
GST_DEBUG_OBJECT (trans,
|
|
"transform returned useless %" GST_PTR_FORMAT, othercaps);
|
|
goto error_cleanup;
|
|
}
|
|
no_transform_possible:
|
|
{
|
|
GST_DEBUG_OBJECT (trans,
|
|
"transform could not transform %" GST_PTR_FORMAT
|
|
" in anything we support", caps);
|
|
goto error_cleanup;
|
|
}
|
|
could_not_fixate:
|
|
{
|
|
GST_DEBUG_OBJECT (trans, "FAILED to fixate %" GST_PTR_FORMAT, othercaps);
|
|
goto error_cleanup;
|
|
}
|
|
peer_no_accept:
|
|
{
|
|
GST_DEBUG_OBJECT (trans, "FAILED to get peer of %" GST_PTR_FORMAT
|
|
" to accept %" GST_PTR_FORMAT, otherpad, othercaps);
|
|
goto error_cleanup;
|
|
}
|
|
error_cleanup:
|
|
{
|
|
if (otherpeer)
|
|
gst_object_unref (otherpeer);
|
|
if (othercaps)
|
|
gst_caps_unref (othercaps);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_base_transform_acceptcaps (GstPad * pad, GstCaps * caps)
|
|
{
|
|
GstBaseTransform *trans;
|
|
#if 0
|
|
GstPad *otherpad;
|
|
GstCaps *othercaps = NULL;
|
|
#endif
|
|
gboolean ret = TRUE;
|
|
|
|
trans = GST_BASE_TRANSFORM (gst_pad_get_parent (pad));
|
|
|
|
#if 0
|
|
otherpad = (pad == trans->srcpad) ? trans->sinkpad : trans->srcpad;
|
|
|
|
/* we need fixed caps for the check, fall back to the default implementation
|
|
* if we don't */
|
|
if (!gst_caps_is_fixed (caps))
|
|
#endif
|
|
{
|
|
GstCaps *allowed;
|
|
|
|
GST_DEBUG_OBJECT (pad, "non fixed accept caps %" GST_PTR_FORMAT, caps);
|
|
|
|
/* get all the formats we can handle on this pad */
|
|
allowed = gst_pad_get_caps_reffed (pad);
|
|
if (!allowed) {
|
|
GST_DEBUG_OBJECT (pad, "gst_pad_get_caps() failed");
|
|
goto no_transform_possible;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (pad, "allowed caps %" GST_PTR_FORMAT, allowed);
|
|
|
|
/* intersect with the requested format */
|
|
ret = gst_caps_can_intersect (allowed, caps);
|
|
gst_caps_unref (allowed);
|
|
|
|
if (!ret)
|
|
goto no_transform_possible;
|
|
}
|
|
#if 0
|
|
else {
|
|
GST_DEBUG_OBJECT (pad, "accept caps %" GST_PTR_FORMAT, caps);
|
|
|
|
/* find best possible caps for the other pad as a way to see if we can
|
|
* transform this caps. */
|
|
othercaps = gst_base_transform_find_transform (trans, pad, caps);
|
|
if (!othercaps || gst_caps_is_empty (othercaps))
|
|
goto no_transform_possible;
|
|
|
|
GST_DEBUG_OBJECT (pad, "we can transform to %" GST_PTR_FORMAT, othercaps);
|
|
}
|
|
#endif
|
|
|
|
done:
|
|
#if 0
|
|
/* We know it's always NULL since we never use it */
|
|
if (othercaps)
|
|
gst_caps_unref (othercaps);
|
|
#endif
|
|
gst_object_unref (trans);
|
|
|
|
return ret;
|
|
|
|
/* ERRORS */
|
|
no_transform_possible:
|
|
{
|
|
GST_WARNING_OBJECT (trans,
|
|
"transform could not transform %" GST_PTR_FORMAT
|
|
" in anything we support", caps);
|
|
ret = FALSE;
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
/* called when new caps arrive on the sink or source pad,
|
|
* We try to find the best caps for the other side using our _find_transform()
|
|
* function. If there are caps, we configure the transform for this new
|
|
* transformation.
|
|
*
|
|
* FIXME, this function is currently commutative but this should not really be
|
|
* because we never set caps starting from the srcpad.
|
|
*/
|
|
static gboolean
|
|
gst_base_transform_setcaps (GstPad * pad, GstCaps * caps)
|
|
{
|
|
GstBaseTransform *trans;
|
|
GstPad *otherpad, *otherpeer;
|
|
GstCaps *othercaps = NULL;
|
|
gboolean ret = TRUE;
|
|
GstCaps *incaps, *outcaps;
|
|
|
|
trans = GST_BASE_TRANSFORM (gst_pad_get_parent (pad));
|
|
|
|
otherpad = (pad == trans->srcpad) ? trans->sinkpad : trans->srcpad;
|
|
otherpeer = gst_pad_get_peer (otherpad);
|
|
|
|
/* if we get called recursively, we bail out now to avoid an
|
|
* infinite loop. */
|
|
if (GST_PAD_IS_IN_SETCAPS (otherpad))
|
|
goto done;
|
|
|
|
GST_DEBUG_OBJECT (pad, "have new caps %p %" GST_PTR_FORMAT, caps, caps);
|
|
|
|
/* find best possible caps for the other pad */
|
|
othercaps = gst_base_transform_find_transform (trans, pad, caps);
|
|
if (!othercaps || gst_caps_is_empty (othercaps))
|
|
goto no_transform_possible;
|
|
|
|
/* configure the element now */
|
|
/* make sure in and out caps are correct */
|
|
if (pad == trans->sinkpad) {
|
|
incaps = caps;
|
|
outcaps = othercaps;
|
|
} else {
|
|
incaps = othercaps;
|
|
outcaps = caps;
|
|
}
|
|
|
|
/* if we have the same caps, we can optimize and reuse the input caps */
|
|
if (gst_caps_is_equal (incaps, outcaps)) {
|
|
GST_INFO_OBJECT (trans, "reuse caps");
|
|
gst_caps_unref (othercaps);
|
|
outcaps = othercaps = gst_caps_ref (incaps);
|
|
}
|
|
|
|
/* call configure now */
|
|
if (!(ret = gst_base_transform_configure_caps (trans, incaps, outcaps)))
|
|
goto failed_configure;
|
|
|
|
/* we know this will work, we implement the setcaps */
|
|
gst_pad_set_caps (otherpad, othercaps);
|
|
|
|
if (pad == trans->srcpad && trans->priv->pad_mode == GST_ACTIVATE_PULL) {
|
|
/* FIXME hm? */
|
|
ret &= gst_pad_set_caps (otherpeer, othercaps);
|
|
if (!ret) {
|
|
GST_INFO_OBJECT (trans, "otherpeer setcaps(%" GST_PTR_FORMAT ") failed",
|
|
othercaps);
|
|
}
|
|
}
|
|
|
|
done:
|
|
if (otherpeer)
|
|
gst_object_unref (otherpeer);
|
|
if (othercaps)
|
|
gst_caps_unref (othercaps);
|
|
|
|
trans->negotiated = ret;
|
|
|
|
gst_object_unref (trans);
|
|
|
|
return ret;
|
|
|
|
/* ERRORS */
|
|
no_transform_possible:
|
|
{
|
|
GST_WARNING_OBJECT (trans,
|
|
"transform could not transform %" GST_PTR_FORMAT
|
|
" in anything we support", caps);
|
|
ret = FALSE;
|
|
goto done;
|
|
}
|
|
failed_configure:
|
|
{
|
|
GST_WARNING_OBJECT (trans, "FAILED to configure caps %" GST_PTR_FORMAT
|
|
" to accept %" GST_PTR_FORMAT, otherpad, othercaps);
|
|
ret = FALSE;
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
/* Allocate a buffer using gst_pad_alloc_buffer
|
|
*
|
|
* This function can do renegotiation on the source pad
|
|
*
|
|
* The output buffer is always writable. outbuf can be equal to
|
|
* inbuf, the caller should be prepared for this and perform
|
|
* appropriate refcounting.
|
|
*/
|
|
static GstFlowReturn
|
|
gst_base_transform_prepare_output_buffer (GstBaseTransform * trans,
|
|
GstBuffer * in_buf, GstBuffer ** out_buf)
|
|
{
|
|
GstBaseTransformClass *bclass;
|
|
GstBaseTransformPrivate *priv;
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
guint outsize, newsize, expsize;
|
|
gboolean discard, setcaps, copymeta;
|
|
GstCaps *incaps, *oldcaps, *newcaps, *outcaps;
|
|
|
|
bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
|
|
|
|
priv = trans->priv;
|
|
|
|
*out_buf = NULL;
|
|
|
|
/* figure out how to allocate a buffer based on the current configuration */
|
|
if (trans->passthrough) {
|
|
GST_DEBUG_OBJECT (trans, "doing passthrough alloc");
|
|
/* passthrough, we don't really need to call pad alloc but we still need to
|
|
* in order to get upstream negotiation. The output size is the same as the
|
|
* input size. */
|
|
outsize = GST_BUFFER_SIZE (in_buf);
|
|
/* we always alloc and discard here */
|
|
discard = TRUE;
|
|
} else {
|
|
gboolean want_in_place = (bclass->transform_ip != NULL)
|
|
&& trans->always_in_place;
|
|
|
|
if (want_in_place) {
|
|
GST_DEBUG_OBJECT (trans, "doing inplace alloc");
|
|
/* we alloc a buffer of the same size as the input */
|
|
outsize = GST_BUFFER_SIZE (in_buf);
|
|
/* only discard it when the input was not writable, otherwise, we reuse
|
|
* the input buffer. */
|
|
discard = gst_buffer_is_writable (in_buf);
|
|
GST_DEBUG_OBJECT (trans, "discard: %d", discard);
|
|
} else {
|
|
GST_DEBUG_OBJECT (trans, "getting output size for copy transform");
|
|
/* copy transform, figure out the output size */
|
|
if (!gst_base_transform_transform_size (trans,
|
|
GST_PAD_SINK, GST_PAD_CAPS (trans->sinkpad),
|
|
GST_BUFFER_SIZE (in_buf), GST_PAD_CAPS (trans->srcpad),
|
|
&outsize)) {
|
|
goto unknown_size;
|
|
}
|
|
/* never discard this buffer, we need it for storing the output */
|
|
discard = FALSE;
|
|
}
|
|
}
|
|
|
|
oldcaps = GST_PAD_CAPS (trans->srcpad);
|
|
|
|
if (bclass->prepare_output_buffer) {
|
|
GST_DEBUG_OBJECT (trans,
|
|
"calling prepare buffer with caps %p %" GST_PTR_FORMAT, oldcaps,
|
|
oldcaps);
|
|
ret =
|
|
bclass->prepare_output_buffer (trans, in_buf, outsize, oldcaps,
|
|
out_buf);
|
|
|
|
/* get a new ref to the srcpad caps, the prepare_output_buffer function can
|
|
* update the pad caps if it wants */
|
|
oldcaps = GST_PAD_CAPS (trans->srcpad);
|
|
|
|
/* FIXME 0.11:
|
|
* decrease refcount again if vmethod returned refcounted in_buf. This
|
|
* is because we need to make sure that the buffer is writable for the
|
|
* in_place transform. The docs of the vmethod say that you should return
|
|
* a reffed inbuf, which is exactly what we don't want :), oh well.. */
|
|
if (in_buf == *out_buf)
|
|
gst_buffer_unref (in_buf);
|
|
|
|
/* never discard the buffer from the prepare_buffer method */
|
|
if (*out_buf != NULL)
|
|
discard = FALSE;
|
|
}
|
|
|
|
if (ret != GST_FLOW_OK)
|
|
goto alloc_failed;
|
|
|
|
if (*out_buf == NULL) {
|
|
GST_DEBUG_OBJECT (trans, "doing alloc with caps %" GST_PTR_FORMAT, oldcaps);
|
|
|
|
ret = gst_pad_alloc_buffer (trans->srcpad,
|
|
GST_BUFFER_OFFSET (in_buf), outsize, oldcaps, out_buf);
|
|
if (ret != GST_FLOW_OK)
|
|
goto alloc_failed;
|
|
}
|
|
|
|
/* must always have a buffer by now */
|
|
if (*out_buf == NULL)
|
|
goto no_buffer;
|
|
|
|
/* check if we got different caps on this new output buffer */
|
|
newcaps = GST_BUFFER_CAPS (*out_buf);
|
|
newsize = GST_BUFFER_SIZE (*out_buf);
|
|
if (newcaps && !gst_caps_is_equal (newcaps, oldcaps)) {
|
|
GstCaps *othercaps;
|
|
gboolean can_convert;
|
|
|
|
GST_DEBUG_OBJECT (trans, "received new caps %" GST_PTR_FORMAT, newcaps);
|
|
|
|
incaps = GST_PAD_CAPS (trans->sinkpad);
|
|
|
|
/* it's possible that the buffer we got is of the wrong size, get the
|
|
* expected size here, we will check the size if we are going to use the
|
|
* buffer later on. */
|
|
gst_base_transform_transform_size (trans,
|
|
GST_PAD_SINK, incaps, GST_BUFFER_SIZE (in_buf), newcaps, &expsize);
|
|
|
|
/* check if we can convert the current incaps to the new target caps */
|
|
can_convert =
|
|
gst_base_transform_can_transform (trans, trans->sinkpad, incaps,
|
|
newcaps);
|
|
|
|
if (can_convert) {
|
|
GST_DEBUG_OBJECT (trans, "reconfigure transform for current buffer");
|
|
/* caps not empty, try to renegotiate to the new format */
|
|
if (!gst_base_transform_configure_caps (trans, incaps, newcaps)) {
|
|
/* not sure we need to fail hard here, we can simply continue our
|
|
* conversion with what we negotiated before */
|
|
goto failed_configure;
|
|
}
|
|
/* new format configure, and use the new output buffer */
|
|
gst_pad_set_caps (trans->srcpad, newcaps);
|
|
discard = FALSE;
|
|
/* if we got a buffer of the wrong size, discard it now and make sure we
|
|
* allocate a propertly sized buffer later. */
|
|
if (newsize != expsize) {
|
|
if (in_buf != *out_buf)
|
|
gst_buffer_unref (*out_buf);
|
|
*out_buf = NULL;
|
|
}
|
|
outsize = expsize;
|
|
} else {
|
|
GST_DEBUG_OBJECT (trans, "cannot perform transform on current buffer");
|
|
|
|
/* we cannot convert the current buffer but we might be able to suggest a
|
|
* new format upstream, try to find what the best format is. */
|
|
othercaps =
|
|
gst_base_transform_find_transform (trans, trans->srcpad, newcaps);
|
|
|
|
if (!othercaps) {
|
|
GST_DEBUG_OBJECT (trans, "incompatible caps, ignoring");
|
|
/* we received caps that we cannot transform. Upstream is behaving badly
|
|
* because it should have checked if we could handle these caps. We can
|
|
* simply ignore these caps and produce a buffer with our original caps. */
|
|
} else {
|
|
guint size_suggest;
|
|
|
|
GST_DEBUG_OBJECT (trans, "getting size of suggestion");
|
|
|
|
/* not a subset, we have a new upstream suggestion, remember it and
|
|
* allocate a default buffer. First we try to convert the size */
|
|
if (gst_base_transform_transform_size (trans,
|
|
GST_PAD_SRC, newcaps, expsize, othercaps, &size_suggest)) {
|
|
|
|
/* ok, remember the suggestions now */
|
|
GST_DEBUG_OBJECT (trans,
|
|
"storing new caps and size suggestion of %u and %" GST_PTR_FORMAT,
|
|
size_suggest, othercaps);
|
|
|
|
GST_OBJECT_LOCK (trans->sinkpad);
|
|
if (priv->sink_suggest)
|
|
gst_caps_unref (priv->sink_suggest);
|
|
priv->sink_suggest = gst_caps_ref (othercaps);
|
|
priv->size_suggest = size_suggest;
|
|
trans->priv->suggest_pending = TRUE;
|
|
GST_OBJECT_UNLOCK (trans->sinkpad);
|
|
}
|
|
gst_caps_unref (othercaps);
|
|
}
|
|
if (in_buf != *out_buf)
|
|
gst_buffer_unref (*out_buf);
|
|
*out_buf = NULL;
|
|
}
|
|
}
|
|
|
|
/* these are the final output caps */
|
|
outcaps = GST_PAD_CAPS (trans->srcpad);
|
|
|
|
copymeta = FALSE;
|
|
if (*out_buf == NULL) {
|
|
if (!discard) {
|
|
GST_DEBUG_OBJECT (trans, "make default output buffer of size %d",
|
|
outsize);
|
|
/* no valid buffer yet, make one, metadata is writable */
|
|
*out_buf = gst_buffer_new_and_alloc (outsize);
|
|
gst_buffer_copy_metadata (*out_buf, in_buf,
|
|
GST_BUFFER_COPY_FLAGS | GST_BUFFER_COPY_TIMESTAMPS);
|
|
} else {
|
|
GST_DEBUG_OBJECT (trans, "reuse input buffer");
|
|
*out_buf = in_buf;
|
|
}
|
|
} else {
|
|
if (trans->passthrough && in_buf != *out_buf) {
|
|
/* we are asked to perform a passthrough transform but the input and
|
|
* output buffers are different. We have to discard the output buffer and
|
|
* reuse the input buffer. */
|
|
GST_DEBUG_OBJECT (trans, "passthrough but different buffers");
|
|
discard = TRUE;
|
|
}
|
|
if (discard) {
|
|
GST_DEBUG_OBJECT (trans, "discard buffer, reuse input buffer");
|
|
gst_buffer_unref (*out_buf);
|
|
*out_buf = in_buf;
|
|
} else {
|
|
GST_DEBUG_OBJECT (trans, "using allocated buffer in %p, out %p", in_buf,
|
|
*out_buf);
|
|
/* if we have different buffers, check if the metadata is ok */
|
|
if (*out_buf != in_buf) {
|
|
guint mask;
|
|
|
|
mask = GST_BUFFER_FLAG_PREROLL | GST_BUFFER_FLAG_IN_CAPS |
|
|
GST_BUFFER_FLAG_DELTA_UNIT | GST_BUFFER_FLAG_DISCONT |
|
|
GST_BUFFER_FLAG_GAP | GST_BUFFER_FLAG_MEDIA1 |
|
|
GST_BUFFER_FLAG_MEDIA2 | GST_BUFFER_FLAG_MEDIA3;
|
|
/* see if the flags and timestamps match */
|
|
copymeta =
|
|
(GST_MINI_OBJECT_FLAGS (*out_buf) & mask) ==
|
|
(GST_MINI_OBJECT_FLAGS (in_buf) & mask);
|
|
copymeta |=
|
|
GST_BUFFER_TIMESTAMP (*out_buf) != GST_BUFFER_TIMESTAMP (in_buf) ||
|
|
GST_BUFFER_DURATION (*out_buf) != GST_BUFFER_DURATION (in_buf) ||
|
|
GST_BUFFER_OFFSET (*out_buf) != GST_BUFFER_OFFSET (in_buf) ||
|
|
GST_BUFFER_OFFSET_END (*out_buf) != GST_BUFFER_OFFSET_END (in_buf);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* check if we need to make things writable. We need this when we need to
|
|
* update the caps or the metadata on the output buffer. */
|
|
newcaps = GST_BUFFER_CAPS (*out_buf);
|
|
/* we check the pointers as a quick check and then go to the more involved
|
|
* check. This is needed when we receive different pointers on the sinkpad
|
|
* that mean the same caps. What we then want to do is prefer those caps over
|
|
* the ones on the srcpad and set the srcpad caps to the buffer caps */
|
|
setcaps = !newcaps || ((newcaps != outcaps)
|
|
&& (!gst_caps_is_equal (newcaps, outcaps)));
|
|
/* we need to modify the metadata when the element is not gap aware,
|
|
* passthrough is not used and the gap flag is set */
|
|
copymeta |= !trans->priv->gap_aware && !trans->passthrough
|
|
&& (GST_MINI_OBJECT_FLAGS (*out_buf) & GST_BUFFER_FLAG_GAP);
|
|
|
|
if (setcaps || copymeta) {
|
|
GST_DEBUG_OBJECT (trans, "setcaps %d, copymeta %d", setcaps, copymeta);
|
|
if (!gst_buffer_is_metadata_writable (*out_buf)) {
|
|
GST_DEBUG_OBJECT (trans, "buffer metadata %p not writable", *out_buf);
|
|
if (in_buf == *out_buf)
|
|
*out_buf = gst_buffer_create_sub (in_buf, 0, GST_BUFFER_SIZE (in_buf));
|
|
else
|
|
*out_buf = gst_buffer_make_metadata_writable (*out_buf);
|
|
}
|
|
/* when we get here, the metadata should be writable */
|
|
if (setcaps)
|
|
gst_buffer_set_caps (*out_buf, outcaps);
|
|
if (copymeta)
|
|
gst_buffer_copy_metadata (*out_buf, in_buf,
|
|
GST_BUFFER_COPY_FLAGS | GST_BUFFER_COPY_TIMESTAMPS);
|
|
/* clear the GAP flag when the subclass does not understand it */
|
|
if (!trans->priv->gap_aware)
|
|
GST_BUFFER_FLAG_UNSET (*out_buf, GST_BUFFER_FLAG_GAP);
|
|
}
|
|
|
|
return ret;
|
|
|
|
/* ERRORS */
|
|
alloc_failed:
|
|
{
|
|
GST_WARNING_OBJECT (trans, "pad-alloc failed: %s", gst_flow_get_name (ret));
|
|
return ret;
|
|
}
|
|
no_buffer:
|
|
{
|
|
GST_ELEMENT_ERROR (trans, STREAM, NOT_IMPLEMENTED,
|
|
("Sub-class failed to provide an output buffer"), (NULL));
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
unknown_size:
|
|
{
|
|
GST_ERROR_OBJECT (trans, "unknown output size");
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
failed_configure:
|
|
{
|
|
GST_WARNING_OBJECT (trans, "failed to configure caps");
|
|
return GST_FLOW_NOT_NEGOTIATED;
|
|
}
|
|
}
|
|
|
|
/* Given @caps calcultate the size of one unit.
|
|
*
|
|
* For video caps, this is the size of one frame (and thus one buffer).
|
|
* For audio caps, this is the size of one sample.
|
|
*
|
|
* These values are cached since they do not change and the calculation
|
|
* potentially involves parsing caps and other expensive stuff.
|
|
*
|
|
* We have two cache locations to store the size, one for the source caps
|
|
* and one for the sink caps.
|
|
*
|
|
* this function returns FALSE if no size could be calculated.
|
|
*/
|
|
static gboolean
|
|
gst_base_transform_get_unit_size (GstBaseTransform * trans, GstCaps * caps,
|
|
guint * size)
|
|
{
|
|
gboolean res = FALSE;
|
|
GstBaseTransformClass *bclass;
|
|
|
|
/* see if we have the result cached */
|
|
if (trans->cache_caps1 == caps) {
|
|
*size = trans->cache_caps1_size;
|
|
GST_DEBUG_OBJECT (trans, "returned %d from first cache", *size);
|
|
return TRUE;
|
|
}
|
|
if (trans->cache_caps2 == caps) {
|
|
*size = trans->cache_caps2_size;
|
|
GST_DEBUG_OBJECT (trans, "returned %d from second cached", *size);
|
|
return TRUE;
|
|
}
|
|
|
|
bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
|
|
if (bclass->get_unit_size) {
|
|
res = bclass->get_unit_size (trans, caps, size);
|
|
GST_DEBUG_OBJECT (trans, "caps %" GST_PTR_FORMAT
|
|
") has unit size %d, result %s", caps, *size, res ? "TRUE" : "FALSE");
|
|
|
|
if (res) {
|
|
/* and cache the values */
|
|
if (trans->cache_caps1 == NULL) {
|
|
gst_caps_replace (&trans->cache_caps1, caps);
|
|
trans->cache_caps1_size = *size;
|
|
GST_DEBUG_OBJECT (trans, "caching %d in first cache", *size);
|
|
} else if (trans->cache_caps2 == NULL) {
|
|
gst_caps_replace (&trans->cache_caps2, caps);
|
|
trans->cache_caps2_size = *size;
|
|
GST_DEBUG_OBJECT (trans, "caching %d in second cache", *size);
|
|
} else {
|
|
GST_DEBUG_OBJECT (trans, "no free spot to cache unit_size");
|
|
}
|
|
}
|
|
} else {
|
|
GST_DEBUG_OBJECT (trans, "Sub-class does not implement get_unit_size");
|
|
}
|
|
return res;
|
|
}
|
|
|
|
/* your upstream peer wants to send you a buffer
|
|
* that buffer has the given offset, size and caps
|
|
* you're requested to allocate a buffer
|
|
*/
|
|
static GstFlowReturn
|
|
gst_base_transform_buffer_alloc (GstPad * pad, guint64 offset, guint size,
|
|
GstCaps * caps, GstBuffer ** buf)
|
|
{
|
|
GstBaseTransform *trans;
|
|
GstBaseTransformPrivate *priv;
|
|
GstFlowReturn res;
|
|
gboolean proxy, suggest, same_caps;
|
|
GstCaps *sink_suggest = NULL;
|
|
guint size_suggest;
|
|
|
|
trans = GST_BASE_TRANSFORM (gst_pad_get_parent (pad));
|
|
priv = trans->priv;
|
|
|
|
GST_DEBUG_OBJECT (pad, "alloc with caps %p %" GST_PTR_FORMAT ", size %u",
|
|
caps, caps, size);
|
|
|
|
/* if the code below does not come up with a better buffer, we will return _OK
|
|
* and an empty buffer. This will trigger the core to allocate a buffer with
|
|
* given input size and caps. */
|
|
*buf = NULL;
|
|
res = GST_FLOW_OK;
|
|
|
|
/* we remember our previous alloc request to quickly see if we can proxy or
|
|
* not. We skip this check if we have a pending suggestion. */
|
|
GST_OBJECT_LOCK (pad);
|
|
same_caps = !priv->suggest_pending && caps &&
|
|
gst_caps_is_equal (priv->sink_alloc, caps);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
if (same_caps) {
|
|
/* we have seen this before, see below if we need to proxy */
|
|
GST_DEBUG_OBJECT (trans, "have old caps %p, size %u", caps, size);
|
|
gst_caps_replace (&sink_suggest, caps);
|
|
size_suggest = size;
|
|
suggest = FALSE;
|
|
} else {
|
|
GST_DEBUG_OBJECT (trans, "new format %p %" GST_PTR_FORMAT, caps, caps);
|
|
|
|
/* if we have a suggestion, pretend we got these as input */
|
|
GST_OBJECT_LOCK (pad);
|
|
if ((priv->sink_suggest && !gst_caps_is_equal (caps, priv->sink_suggest))) {
|
|
sink_suggest = gst_caps_ref (priv->sink_suggest);
|
|
size_suggest = priv->size_suggest;
|
|
GST_DEBUG_OBJECT (trans, "have suggestion %p %" GST_PTR_FORMAT " size %u",
|
|
sink_suggest, sink_suggest, priv->size_suggest);
|
|
/* suggest is TRUE when we have a custom suggestion pending that we need
|
|
* to unref later. */
|
|
suggest = TRUE;
|
|
} else {
|
|
GST_DEBUG_OBJECT (trans, "using caps %p %" GST_PTR_FORMAT " size %u",
|
|
caps, caps, size);
|
|
gst_caps_replace (&sink_suggest, caps);
|
|
size_suggest = size;
|
|
suggest = FALSE;
|
|
}
|
|
priv->suggest_pending = FALSE;
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
/* check if we actually handle this format on the sinkpad */
|
|
if (sink_suggest) {
|
|
const GstCaps *templ;
|
|
|
|
if (!gst_caps_is_fixed (sink_suggest)) {
|
|
GstCaps *peercaps;
|
|
|
|
GST_DEBUG_OBJECT (trans, "Suggested caps is not fixed: %"
|
|
GST_PTR_FORMAT, sink_suggest);
|
|
|
|
peercaps =
|
|
gst_pad_peer_get_caps_reffed (GST_BASE_TRANSFORM_SINK_PAD (trans));
|
|
/* try fixating by intersecting with peer caps */
|
|
if (peercaps) {
|
|
GstCaps *intersect;
|
|
|
|
intersect = gst_caps_intersect (peercaps, sink_suggest);
|
|
gst_caps_unref (peercaps);
|
|
gst_caps_unref (sink_suggest);
|
|
sink_suggest = intersect;
|
|
}
|
|
|
|
if (gst_caps_is_empty (sink_suggest))
|
|
goto not_supported;
|
|
|
|
/* be safe and call default fixate */
|
|
sink_suggest = gst_caps_make_writable (sink_suggest);
|
|
gst_pad_fixate_caps (GST_BASE_TRANSFORM_SINK_PAD (trans), sink_suggest);
|
|
|
|
if (!gst_caps_is_fixed (sink_suggest)) {
|
|
gst_caps_unref (sink_suggest);
|
|
sink_suggest = NULL;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (trans, "Caps fixated to now: %" GST_PTR_FORMAT,
|
|
sink_suggest);
|
|
}
|
|
|
|
if (sink_suggest) {
|
|
templ = gst_pad_get_pad_template_caps (pad);
|
|
|
|
if (!gst_caps_can_intersect (sink_suggest, templ))
|
|
goto not_supported;
|
|
}
|
|
}
|
|
|
|
/* find the best format for the other side here we decide if we will proxy
|
|
* the caps or not. */
|
|
if (sink_suggest == NULL) {
|
|
/* always proxy when the caps are NULL. When this is a new format, see if
|
|
* we can proxy it downstream */
|
|
GST_DEBUG_OBJECT (trans, "null caps, marking for proxy");
|
|
priv->proxy_alloc = TRUE;
|
|
} else {
|
|
GstCaps *othercaps;
|
|
|
|
/* we have a new format, see what we need to proxy to */
|
|
othercaps = gst_base_transform_find_transform (trans, pad, sink_suggest);
|
|
if (!othercaps || gst_caps_is_empty (othercaps)) {
|
|
/* no transform possible, we certainly can't proxy */
|
|
GST_DEBUG_OBJECT (trans, "can't find transform, disable proxy");
|
|
priv->proxy_alloc = FALSE;
|
|
} else {
|
|
/* we transformed into something */
|
|
if (gst_caps_is_equal (sink_suggest, othercaps)) {
|
|
GST_DEBUG_OBJECT (trans,
|
|
"best caps same as input, marking for proxy");
|
|
priv->proxy_alloc = TRUE;
|
|
} else {
|
|
GST_DEBUG_OBJECT (trans,
|
|
"best caps different from input, disable proxy");
|
|
priv->proxy_alloc = FALSE;
|
|
}
|
|
}
|
|
if (othercaps)
|
|
gst_caps_unref (othercaps);
|
|
}
|
|
}
|
|
/* remember the new caps */
|
|
GST_OBJECT_LOCK (pad);
|
|
gst_caps_replace (&priv->sink_alloc, sink_suggest);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
|
|
proxy = priv->proxy_alloc;
|
|
GST_DEBUG_OBJECT (trans, "doing default alloc, proxy %d", proxy);
|
|
|
|
/* we only want to proxy if we have no suggestion pending, FIXME */
|
|
if (proxy && !suggest) {
|
|
GstCaps *newcaps;
|
|
|
|
GST_DEBUG_OBJECT (trans, "proxy buffer-alloc with caps %p %" GST_PTR_FORMAT
|
|
", size %u", caps, caps, size);
|
|
|
|
/* we always proxy the input caps, never the suggestion. The reason is that
|
|
* We don't yet handle the caps of renegotiation in here. FIXME */
|
|
res = gst_pad_alloc_buffer (trans->srcpad, offset, size, caps, buf);
|
|
if (res != GST_FLOW_OK)
|
|
goto alloc_failed;
|
|
|
|
/* check if the caps changed */
|
|
newcaps = GST_BUFFER_CAPS (*buf);
|
|
|
|
GST_DEBUG_OBJECT (trans, "got caps %" GST_PTR_FORMAT, newcaps);
|
|
|
|
if (!gst_caps_is_equal (newcaps, caps)) {
|
|
GST_DEBUG_OBJECT (trans, "caps are new");
|
|
/* we have new caps, see if we can proxy downstream */
|
|
if (gst_pad_peer_accept_caps (pad, newcaps)) {
|
|
/* peer accepts the caps, return a buffer in this format */
|
|
GST_DEBUG_OBJECT (trans, "peer accepted new caps");
|
|
/* remember the format */
|
|
GST_OBJECT_LOCK (pad);
|
|
gst_caps_replace (&priv->sink_alloc, newcaps);
|
|
GST_OBJECT_UNLOCK (pad);
|
|
} else {
|
|
GST_DEBUG_OBJECT (trans, "peer did not accept new caps");
|
|
/* peer does not accept the caps, free the buffer we received and
|
|
* create a buffer of the requested format by the default handler. */
|
|
gst_buffer_unref (*buf);
|
|
*buf = NULL;
|
|
}
|
|
} else {
|
|
GST_DEBUG_OBJECT (trans, "received required caps from peer");
|
|
}
|
|
}
|
|
|
|
if (suggest) {
|
|
/* there was a custom suggestion, create a buffer of this format and return
|
|
* it. Note that this format */
|
|
*buf = gst_buffer_new_and_alloc (size_suggest);
|
|
GST_DEBUG_OBJECT (trans,
|
|
"doing suggestion of size %u, caps %p %" GST_PTR_FORMAT, size_suggest,
|
|
sink_suggest, sink_suggest);
|
|
GST_BUFFER_CAPS (*buf) = sink_suggest;
|
|
sink_suggest = NULL;
|
|
}
|
|
|
|
gst_object_unref (trans);
|
|
if (sink_suggest)
|
|
gst_caps_unref (sink_suggest);
|
|
|
|
return res;
|
|
|
|
/* ERRORS */
|
|
alloc_failed:
|
|
{
|
|
GST_DEBUG_OBJECT (trans, "pad alloc failed: %s", gst_flow_get_name (res));
|
|
if (sink_suggest)
|
|
gst_caps_unref (sink_suggest);
|
|
gst_object_unref (trans);
|
|
return res;
|
|
}
|
|
not_supported:
|
|
{
|
|
GST_DEBUG_OBJECT (trans, "pad alloc with unsupported caps");
|
|
if (sink_suggest)
|
|
gst_caps_unref (sink_suggest);
|
|
gst_object_unref (trans);
|
|
return GST_FLOW_NOT_NEGOTIATED;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_base_transform_sink_event (GstPad * pad, GstEvent * event)
|
|
{
|
|
GstBaseTransform *trans;
|
|
GstBaseTransformClass *bclass;
|
|
gboolean ret = TRUE;
|
|
gboolean forward = TRUE;
|
|
|
|
trans = GST_BASE_TRANSFORM (gst_pad_get_parent (pad));
|
|
bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
|
|
|
|
if (bclass->event)
|
|
forward = bclass->event (trans, event);
|
|
|
|
/* FIXME, do this in the default event handler so the subclass can do
|
|
* something different. */
|
|
if (forward)
|
|
ret = gst_pad_push_event (trans->srcpad, event);
|
|
else
|
|
gst_event_unref (event);
|
|
|
|
gst_object_unref (trans);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_base_transform_sink_eventfunc (GstBaseTransform * trans, GstEvent * event)
|
|
{
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_FLUSH_START:
|
|
break;
|
|
case GST_EVENT_FLUSH_STOP:
|
|
GST_OBJECT_LOCK (trans);
|
|
/* reset QoS parameters */
|
|
trans->priv->proportion = 1.0;
|
|
trans->priv->earliest_time = -1;
|
|
trans->priv->discont = FALSE;
|
|
trans->priv->processed = 0;
|
|
trans->priv->dropped = 0;
|
|
GST_OBJECT_UNLOCK (trans);
|
|
/* we need new segment info after the flush. */
|
|
trans->have_newsegment = FALSE;
|
|
gst_segment_init (&trans->segment, GST_FORMAT_UNDEFINED);
|
|
break;
|
|
case GST_EVENT_EOS:
|
|
break;
|
|
case GST_EVENT_TAG:
|
|
break;
|
|
case GST_EVENT_NEWSEGMENT:
|
|
{
|
|
GstFormat format;
|
|
gdouble rate, arate;
|
|
gint64 start, stop, time;
|
|
gboolean update;
|
|
|
|
gst_event_parse_new_segment_full (event, &update, &rate, &arate, &format,
|
|
&start, &stop, &time);
|
|
|
|
trans->have_newsegment = TRUE;
|
|
|
|
gst_segment_set_newsegment_full (&trans->segment, update, rate, arate,
|
|
format, start, stop, time);
|
|
|
|
if (format == GST_FORMAT_TIME) {
|
|
GST_DEBUG_OBJECT (trans, "received TIME NEW_SEGMENT %" GST_TIME_FORMAT
|
|
" -- %" GST_TIME_FORMAT ", time %" GST_TIME_FORMAT
|
|
", accum %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (trans->segment.start),
|
|
GST_TIME_ARGS (trans->segment.stop),
|
|
GST_TIME_ARGS (trans->segment.time),
|
|
GST_TIME_ARGS (trans->segment.accum));
|
|
} else {
|
|
GST_DEBUG_OBJECT (trans, "received NEW_SEGMENT %" G_GINT64_FORMAT
|
|
" -- %" G_GINT64_FORMAT ", time %" G_GINT64_FORMAT
|
|
", accum %" G_GINT64_FORMAT,
|
|
trans->segment.start, trans->segment.stop,
|
|
trans->segment.time, trans->segment.accum);
|
|
}
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
gst_base_transform_src_event (GstPad * pad, GstEvent * event)
|
|
{
|
|
GstBaseTransform *trans;
|
|
GstBaseTransformClass *bclass;
|
|
gboolean ret = TRUE;
|
|
|
|
trans = GST_BASE_TRANSFORM (gst_pad_get_parent (pad));
|
|
bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
|
|
|
|
if (bclass->src_event)
|
|
ret = bclass->src_event (trans, event);
|
|
|
|
gst_object_unref (trans);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_base_transform_src_eventfunc (GstBaseTransform * trans, GstEvent * event)
|
|
{
|
|
gboolean ret;
|
|
|
|
switch (GST_EVENT_TYPE (event)) {
|
|
case GST_EVENT_SEEK:
|
|
break;
|
|
case GST_EVENT_NAVIGATION:
|
|
break;
|
|
case GST_EVENT_QOS:
|
|
{
|
|
gdouble proportion;
|
|
GstClockTimeDiff diff;
|
|
GstClockTime timestamp;
|
|
|
|
gst_event_parse_qos (event, &proportion, &diff, ×tamp);
|
|
gst_base_transform_update_qos (trans, proportion, diff, timestamp);
|
|
break;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ret = gst_pad_push_event (trans->sinkpad, event);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* perform a transform on @inbuf and put the result in @outbuf.
|
|
*
|
|
* This function is common to the push and pull-based operations.
|
|
*
|
|
* This function takes ownership of @inbuf */
|
|
static GstFlowReturn
|
|
gst_base_transform_handle_buffer (GstBaseTransform * trans, GstBuffer * inbuf,
|
|
GstBuffer ** outbuf)
|
|
{
|
|
GstBaseTransformClass *bclass;
|
|
GstFlowReturn ret = GST_FLOW_OK;
|
|
gboolean want_in_place, reconfigure;
|
|
GstClockTime running_time;
|
|
GstClockTime timestamp;
|
|
GstCaps *incaps;
|
|
|
|
bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
|
|
|
|
if (G_LIKELY ((incaps = GST_BUFFER_CAPS (inbuf)))) {
|
|
GST_OBJECT_LOCK (trans);
|
|
reconfigure = trans->priv->reconfigure;
|
|
trans->priv->reconfigure = FALSE;
|
|
GST_OBJECT_UNLOCK (trans);
|
|
|
|
if (G_UNLIKELY (reconfigure)) {
|
|
GST_DEBUG_OBJECT (trans, "we had a pending reconfigure");
|
|
/* if we need to reconfigure we pretend a buffer with new caps arrived. This
|
|
* will reconfigure the transform with the new output format. We can only
|
|
* do this if the buffer actually has caps. */
|
|
if (!gst_base_transform_setcaps (trans->sinkpad, incaps))
|
|
goto not_negotiated;
|
|
}
|
|
}
|
|
|
|
if (GST_BUFFER_OFFSET_IS_VALID (inbuf))
|
|
GST_DEBUG_OBJECT (trans, "handling buffer %p of size %d and offset %"
|
|
G_GUINT64_FORMAT, inbuf, GST_BUFFER_SIZE (inbuf),
|
|
GST_BUFFER_OFFSET (inbuf));
|
|
else
|
|
GST_DEBUG_OBJECT (trans, "handling buffer %p of size %d and offset NONE",
|
|
inbuf, GST_BUFFER_SIZE (inbuf));
|
|
|
|
/* Don't allow buffer handling before negotiation, except in passthrough mode
|
|
* or if the class doesn't implement a set_caps function (in which case it doesn't
|
|
* care about caps)
|
|
*/
|
|
if (!trans->negotiated && !trans->passthrough && (bclass->set_caps != NULL))
|
|
goto not_negotiated;
|
|
|
|
/* Set discont flag so we can mark the outgoing buffer */
|
|
if (GST_BUFFER_IS_DISCONT (inbuf)) {
|
|
GST_DEBUG_OBJECT (trans, "got DISCONT buffer %p", inbuf);
|
|
trans->priv->discont = TRUE;
|
|
}
|
|
|
|
/* can only do QoS if the segment is in TIME */
|
|
if (trans->segment.format != GST_FORMAT_TIME)
|
|
goto no_qos;
|
|
|
|
/* QOS is done on the running time of the buffer, get it now */
|
|
timestamp = GST_BUFFER_TIMESTAMP (inbuf);
|
|
running_time = gst_segment_to_running_time (&trans->segment, GST_FORMAT_TIME,
|
|
timestamp);
|
|
|
|
if (running_time != -1) {
|
|
gboolean need_skip;
|
|
GstClockTime earliest_time;
|
|
gdouble proportion;
|
|
|
|
/* lock for getting the QoS parameters that are set (in a different thread)
|
|
* with the QOS events */
|
|
GST_OBJECT_LOCK (trans);
|
|
earliest_time = trans->priv->earliest_time;
|
|
proportion = trans->priv->proportion;
|
|
/* check for QoS, don't perform conversion for buffers
|
|
* that are known to be late. */
|
|
need_skip = trans->priv->qos_enabled &&
|
|
earliest_time != -1 && running_time <= earliest_time;
|
|
GST_OBJECT_UNLOCK (trans);
|
|
|
|
if (need_skip) {
|
|
GstMessage *qos_msg;
|
|
GstClockTime duration;
|
|
guint64 stream_time;
|
|
gint64 jitter;
|
|
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_QOS, trans, "skipping transform: qostime %"
|
|
GST_TIME_FORMAT " <= %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (running_time), GST_TIME_ARGS (earliest_time));
|
|
|
|
trans->priv->dropped++;
|
|
|
|
duration = GST_BUFFER_DURATION (inbuf);
|
|
stream_time =
|
|
gst_segment_to_stream_time (&trans->segment, GST_FORMAT_TIME,
|
|
timestamp);
|
|
jitter = GST_CLOCK_DIFF (running_time, earliest_time);
|
|
|
|
qos_msg =
|
|
gst_message_new_qos (GST_OBJECT_CAST (trans), FALSE, running_time,
|
|
stream_time, timestamp, duration);
|
|
gst_message_set_qos_values (qos_msg, jitter, proportion, 1000000);
|
|
gst_message_set_qos_stats (qos_msg, GST_FORMAT_BUFFERS,
|
|
trans->priv->processed, trans->priv->dropped);
|
|
gst_element_post_message (GST_ELEMENT_CAST (trans), qos_msg);
|
|
|
|
/* mark discont for next buffer */
|
|
trans->priv->discont = TRUE;
|
|
goto skip;
|
|
}
|
|
}
|
|
|
|
no_qos:
|
|
|
|
/* first try to allocate an output buffer based on the currently negotiated
|
|
* format. While we call pad-alloc we could renegotiate the srcpad format or
|
|
* have a new suggestion for upstream buffer-alloc.
|
|
* In any case, outbuf will contain a buffer suitable for doing the configured
|
|
* transform after this function. */
|
|
ret = gst_base_transform_prepare_output_buffer (trans, inbuf, outbuf);
|
|
if (G_UNLIKELY (ret != GST_FLOW_OK))
|
|
goto no_buffer;
|
|
|
|
/* now perform the needed transform */
|
|
if (trans->passthrough) {
|
|
/* In passthrough mode, give transform_ip a look at the
|
|
* buffer, without making it writable, or just push the
|
|
* data through */
|
|
if (bclass->transform_ip) {
|
|
GST_DEBUG_OBJECT (trans, "doing passthrough transform");
|
|
ret = bclass->transform_ip (trans, *outbuf);
|
|
} else {
|
|
GST_DEBUG_OBJECT (trans, "element is in passthrough");
|
|
}
|
|
} else {
|
|
want_in_place = (bclass->transform_ip != NULL) && trans->always_in_place;
|
|
|
|
if (want_in_place) {
|
|
GST_DEBUG_OBJECT (trans, "doing inplace transform");
|
|
|
|
if (inbuf != *outbuf) {
|
|
/* different buffers, copy the input to the output first, we then do an
|
|
* in-place transform on the output buffer. */
|
|
memcpy (GST_BUFFER_DATA (*outbuf), GST_BUFFER_DATA (inbuf),
|
|
GST_BUFFER_SIZE (inbuf));
|
|
}
|
|
ret = bclass->transform_ip (trans, *outbuf);
|
|
} else {
|
|
GST_DEBUG_OBJECT (trans, "doing non-inplace transform");
|
|
|
|
if (bclass->transform)
|
|
ret = bclass->transform (trans, inbuf, *outbuf);
|
|
else
|
|
ret = GST_FLOW_NOT_SUPPORTED;
|
|
}
|
|
}
|
|
|
|
skip:
|
|
/* only unref input buffer if we allocated a new outbuf buffer */
|
|
if (*outbuf != inbuf)
|
|
gst_buffer_unref (inbuf);
|
|
|
|
return ret;
|
|
|
|
/* ERRORS */
|
|
not_negotiated:
|
|
{
|
|
gst_buffer_unref (inbuf);
|
|
GST_ELEMENT_ERROR (trans, STREAM, NOT_IMPLEMENTED,
|
|
("not negotiated"), ("not negotiated"));
|
|
return GST_FLOW_NOT_NEGOTIATED;
|
|
}
|
|
no_buffer:
|
|
{
|
|
gst_buffer_unref (inbuf);
|
|
GST_WARNING_OBJECT (trans, "could not get buffer from pool: %s",
|
|
gst_flow_get_name (ret));
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_base_transform_check_get_range (GstPad * pad)
|
|
{
|
|
GstBaseTransform *trans;
|
|
gboolean ret;
|
|
|
|
trans = GST_BASE_TRANSFORM (gst_pad_get_parent (pad));
|
|
|
|
ret = gst_pad_check_pull_range (trans->sinkpad);
|
|
|
|
gst_object_unref (trans);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/* FIXME, getrange is broken, need to pull range from the other
|
|
* end based on the transform_size result.
|
|
*/
|
|
static GstFlowReturn
|
|
gst_base_transform_getrange (GstPad * pad, guint64 offset,
|
|
guint length, GstBuffer ** buffer)
|
|
{
|
|
GstBaseTransform *trans;
|
|
GstBaseTransformClass *klass;
|
|
GstFlowReturn ret;
|
|
GstBuffer *inbuf;
|
|
|
|
trans = GST_BASE_TRANSFORM (gst_pad_get_parent (pad));
|
|
|
|
ret = gst_pad_pull_range (trans->sinkpad, offset, length, &inbuf);
|
|
if (G_UNLIKELY (ret != GST_FLOW_OK))
|
|
goto pull_error;
|
|
|
|
klass = GST_BASE_TRANSFORM_GET_CLASS (trans);
|
|
if (klass->before_transform)
|
|
klass->before_transform (trans, inbuf);
|
|
|
|
GST_BASE_TRANSFORM_LOCK (trans);
|
|
ret = gst_base_transform_handle_buffer (trans, inbuf, buffer);
|
|
GST_BASE_TRANSFORM_UNLOCK (trans);
|
|
|
|
done:
|
|
gst_object_unref (trans);
|
|
|
|
return ret;
|
|
|
|
/* ERRORS */
|
|
pull_error:
|
|
{
|
|
GST_DEBUG_OBJECT (trans, "failed to pull a buffer: %s",
|
|
gst_flow_get_name (ret));
|
|
goto done;
|
|
}
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_base_transform_chain (GstPad * pad, GstBuffer * buffer)
|
|
{
|
|
GstBaseTransform *trans;
|
|
GstBaseTransformClass *klass;
|
|
GstFlowReturn ret;
|
|
GstClockTime last_stop = GST_CLOCK_TIME_NONE;
|
|
GstClockTime timestamp, duration;
|
|
GstBuffer *outbuf = NULL;
|
|
|
|
trans = GST_BASE_TRANSFORM (GST_OBJECT_PARENT (pad));
|
|
|
|
timestamp = GST_BUFFER_TIMESTAMP (buffer);
|
|
duration = GST_BUFFER_DURATION (buffer);
|
|
|
|
/* calculate end position of the incoming buffer */
|
|
if (timestamp != GST_CLOCK_TIME_NONE) {
|
|
if (duration != GST_CLOCK_TIME_NONE)
|
|
last_stop = timestamp + duration;
|
|
else
|
|
last_stop = timestamp;
|
|
}
|
|
|
|
klass = GST_BASE_TRANSFORM_GET_CLASS (trans);
|
|
if (klass->before_transform)
|
|
klass->before_transform (trans, buffer);
|
|
|
|
/* protect transform method and concurrent buffer alloc */
|
|
GST_BASE_TRANSFORM_LOCK (trans);
|
|
ret = gst_base_transform_handle_buffer (trans, buffer, &outbuf);
|
|
GST_BASE_TRANSFORM_UNLOCK (trans);
|
|
|
|
/* outbuf can be NULL, this means a dropped buffer, if we have a buffer but
|
|
* GST_BASE_TRANSFORM_FLOW_DROPPED we will not push either. */
|
|
if (outbuf != NULL) {
|
|
if ((ret == GST_FLOW_OK)) {
|
|
/* Remember last stop position */
|
|
if ((last_stop != GST_CLOCK_TIME_NONE) &&
|
|
(trans->segment.format == GST_FORMAT_TIME))
|
|
gst_segment_set_last_stop (&trans->segment, GST_FORMAT_TIME, last_stop);
|
|
|
|
/* apply DISCONT flag if the buffer is not yet marked as such */
|
|
if (trans->priv->discont) {
|
|
if (!GST_BUFFER_IS_DISCONT (outbuf)) {
|
|
outbuf = gst_buffer_make_metadata_writable (outbuf);
|
|
GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
|
|
}
|
|
trans->priv->discont = FALSE;
|
|
}
|
|
trans->priv->processed++;
|
|
ret = gst_pad_push (trans->srcpad, outbuf);
|
|
} else {
|
|
gst_buffer_unref (outbuf);
|
|
}
|
|
}
|
|
|
|
/* convert internal flow to OK and mark discont for the next buffer. */
|
|
if (ret == GST_BASE_TRANSFORM_FLOW_DROPPED) {
|
|
trans->priv->discont = TRUE;
|
|
ret = GST_FLOW_OK;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
gst_base_transform_set_property (GObject * object, guint prop_id,
|
|
const GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstBaseTransform *trans;
|
|
|
|
trans = GST_BASE_TRANSFORM (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_QOS:
|
|
gst_base_transform_set_qos_enabled (trans, g_value_get_boolean (value));
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_base_transform_get_property (GObject * object, guint prop_id,
|
|
GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstBaseTransform *trans;
|
|
|
|
trans = GST_BASE_TRANSFORM (object);
|
|
|
|
switch (prop_id) {
|
|
case PROP_QOS:
|
|
g_value_set_boolean (value, gst_base_transform_is_qos_enabled (trans));
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* not a vmethod of anything, just an internal method */
|
|
static gboolean
|
|
gst_base_transform_activate (GstBaseTransform * trans, gboolean active)
|
|
{
|
|
GstBaseTransformClass *bclass;
|
|
gboolean result = TRUE;
|
|
|
|
bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
|
|
|
|
if (active) {
|
|
if (trans->priv->pad_mode == GST_ACTIVATE_NONE && bclass->start)
|
|
result &= bclass->start (trans);
|
|
|
|
GST_OBJECT_LOCK (trans);
|
|
|
|
if (GST_PAD_CAPS (trans->sinkpad) && GST_PAD_CAPS (trans->srcpad))
|
|
trans->have_same_caps =
|
|
gst_caps_is_equal (GST_PAD_CAPS (trans->sinkpad),
|
|
GST_PAD_CAPS (trans->srcpad)) || trans->passthrough;
|
|
else
|
|
trans->have_same_caps = trans->passthrough;
|
|
GST_DEBUG_OBJECT (trans, "have_same_caps %d", trans->have_same_caps);
|
|
trans->negotiated = FALSE;
|
|
trans->have_newsegment = FALSE;
|
|
gst_segment_init (&trans->segment, GST_FORMAT_UNDEFINED);
|
|
trans->priv->proportion = 1.0;
|
|
trans->priv->earliest_time = -1;
|
|
trans->priv->discont = FALSE;
|
|
gst_caps_replace (&trans->priv->sink_suggest, NULL);
|
|
trans->priv->processed = 0;
|
|
trans->priv->dropped = 0;
|
|
|
|
GST_OBJECT_UNLOCK (trans);
|
|
} else {
|
|
/* We must make sure streaming has finished before resetting things
|
|
* and calling the ::stop vfunc */
|
|
GST_PAD_STREAM_LOCK (trans->sinkpad);
|
|
GST_PAD_STREAM_UNLOCK (trans->sinkpad);
|
|
|
|
trans->have_same_caps = FALSE;
|
|
/* We can only reset the passthrough mode if the instance told us to
|
|
handle it in configure_caps */
|
|
if (bclass->passthrough_on_same_caps) {
|
|
gst_base_transform_set_passthrough (trans, FALSE);
|
|
}
|
|
gst_caps_replace (&trans->cache_caps1, NULL);
|
|
gst_caps_replace (&trans->cache_caps2, NULL);
|
|
gst_caps_replace (&trans->priv->sink_alloc, NULL);
|
|
gst_caps_replace (&trans->priv->sink_suggest, NULL);
|
|
|
|
if (trans->priv->pad_mode != GST_ACTIVATE_NONE && bclass->stop)
|
|
result &= bclass->stop (trans);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static gboolean
|
|
gst_base_transform_sink_activate_push (GstPad * pad, gboolean active)
|
|
{
|
|
gboolean result = TRUE;
|
|
GstBaseTransform *trans;
|
|
|
|
trans = GST_BASE_TRANSFORM (gst_pad_get_parent (pad));
|
|
|
|
result = gst_base_transform_activate (trans, active);
|
|
|
|
if (result)
|
|
trans->priv->pad_mode = active ? GST_ACTIVATE_PUSH : GST_ACTIVATE_NONE;
|
|
|
|
gst_object_unref (trans);
|
|
|
|
return result;
|
|
}
|
|
|
|
static gboolean
|
|
gst_base_transform_src_activate_pull (GstPad * pad, gboolean active)
|
|
{
|
|
gboolean result = FALSE;
|
|
GstBaseTransform *trans;
|
|
|
|
trans = GST_BASE_TRANSFORM (gst_pad_get_parent (pad));
|
|
|
|
result = gst_pad_activate_pull (trans->sinkpad, active);
|
|
|
|
if (result)
|
|
result &= gst_base_transform_activate (trans, active);
|
|
|
|
if (result)
|
|
trans->priv->pad_mode = active ? GST_ACTIVATE_PULL : GST_ACTIVATE_NONE;
|
|
|
|
gst_object_unref (trans);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* gst_base_transform_set_passthrough:
|
|
* @trans: the #GstBaseTransform to set
|
|
* @passthrough: boolean indicating passthrough mode.
|
|
*
|
|
* Set passthrough mode for this filter by default. This is mostly
|
|
* useful for filters that do not care about negotiation.
|
|
*
|
|
* Always TRUE for filters which don't implement either a transform
|
|
* or transform_ip method.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
void
|
|
gst_base_transform_set_passthrough (GstBaseTransform * trans,
|
|
gboolean passthrough)
|
|
{
|
|
GstBaseTransformClass *bclass;
|
|
|
|
g_return_if_fail (GST_IS_BASE_TRANSFORM (trans));
|
|
|
|
bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
|
|
|
|
GST_OBJECT_LOCK (trans);
|
|
if (passthrough == FALSE) {
|
|
if (bclass->transform_ip || bclass->transform)
|
|
trans->passthrough = FALSE;
|
|
} else {
|
|
trans->passthrough = TRUE;
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (trans, "set passthrough %d", trans->passthrough);
|
|
GST_OBJECT_UNLOCK (trans);
|
|
}
|
|
|
|
/**
|
|
* gst_base_transform_is_passthrough:
|
|
* @trans: the #GstBaseTransform to query
|
|
*
|
|
* See if @trans is configured as a passthrough transform.
|
|
*
|
|
* Returns: TRUE is the transform is configured in passthrough mode.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
gboolean
|
|
gst_base_transform_is_passthrough (GstBaseTransform * trans)
|
|
{
|
|
gboolean result;
|
|
|
|
g_return_val_if_fail (GST_IS_BASE_TRANSFORM (trans), FALSE);
|
|
|
|
GST_OBJECT_LOCK (trans);
|
|
result = trans->passthrough;
|
|
GST_OBJECT_UNLOCK (trans);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* gst_base_transform_set_in_place:
|
|
* @trans: the #GstBaseTransform to modify
|
|
* @in_place: Boolean value indicating that we would like to operate
|
|
* on in_place buffers.
|
|
*
|
|
* Determines whether a non-writable buffer will be copied before passing
|
|
* to the transform_ip function.
|
|
* <itemizedlist>
|
|
* <listitem>Always TRUE if no transform function is implemented.</listitem>
|
|
* <listitem>Always FALSE if ONLY transform function is implemented.</listitem>
|
|
* </itemizedlist>
|
|
*
|
|
* MT safe.
|
|
*/
|
|
void
|
|
gst_base_transform_set_in_place (GstBaseTransform * trans, gboolean in_place)
|
|
{
|
|
GstBaseTransformClass *bclass;
|
|
|
|
g_return_if_fail (GST_IS_BASE_TRANSFORM (trans));
|
|
|
|
bclass = GST_BASE_TRANSFORM_GET_CLASS (trans);
|
|
|
|
GST_OBJECT_LOCK (trans);
|
|
|
|
if (in_place) {
|
|
if (bclass->transform_ip) {
|
|
GST_DEBUG_OBJECT (trans, "setting in_place TRUE");
|
|
trans->always_in_place = TRUE;
|
|
}
|
|
} else {
|
|
if (bclass->transform) {
|
|
GST_DEBUG_OBJECT (trans, "setting in_place FALSE");
|
|
trans->always_in_place = FALSE;
|
|
}
|
|
}
|
|
|
|
GST_OBJECT_UNLOCK (trans);
|
|
}
|
|
|
|
/**
|
|
* gst_base_transform_is_in_place:
|
|
* @trans: the #GstBaseTransform to query
|
|
*
|
|
* See if @trans is configured as a in_place transform.
|
|
*
|
|
* Returns: TRUE is the transform is configured in in_place mode.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
gboolean
|
|
gst_base_transform_is_in_place (GstBaseTransform * trans)
|
|
{
|
|
gboolean result;
|
|
|
|
g_return_val_if_fail (GST_IS_BASE_TRANSFORM (trans), FALSE);
|
|
|
|
GST_OBJECT_LOCK (trans);
|
|
result = trans->always_in_place;
|
|
GST_OBJECT_UNLOCK (trans);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* gst_base_transform_update_qos:
|
|
* @trans: a #GstBaseTransform
|
|
* @proportion: the proportion
|
|
* @diff: the diff against the clock
|
|
* @timestamp: the timestamp of the buffer generating the QoS expressed in
|
|
* running_time.
|
|
*
|
|
* Set the QoS parameters in the transform. This function is called internally
|
|
* when a QOS event is received but subclasses can provide custom information
|
|
* when needed.
|
|
*
|
|
* MT safe.
|
|
*
|
|
* Since: 0.10.5
|
|
*/
|
|
void
|
|
gst_base_transform_update_qos (GstBaseTransform * trans,
|
|
gdouble proportion, GstClockTimeDiff diff, GstClockTime timestamp)
|
|
{
|
|
|
|
g_return_if_fail (GST_IS_BASE_TRANSFORM (trans));
|
|
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_QOS, trans,
|
|
"qos: proportion: %lf, diff %" G_GINT64_FORMAT ", timestamp %"
|
|
GST_TIME_FORMAT, proportion, diff, GST_TIME_ARGS (timestamp));
|
|
|
|
GST_OBJECT_LOCK (trans);
|
|
trans->priv->proportion = proportion;
|
|
trans->priv->earliest_time = timestamp + diff;
|
|
GST_OBJECT_UNLOCK (trans);
|
|
}
|
|
|
|
/**
|
|
* gst_base_transform_set_qos_enabled:
|
|
* @trans: a #GstBaseTransform
|
|
* @enabled: new state
|
|
*
|
|
* Enable or disable QoS handling in the transform.
|
|
*
|
|
* MT safe.
|
|
*
|
|
* Since: 0.10.5
|
|
*/
|
|
void
|
|
gst_base_transform_set_qos_enabled (GstBaseTransform * trans, gboolean enabled)
|
|
{
|
|
g_return_if_fail (GST_IS_BASE_TRANSFORM (trans));
|
|
|
|
GST_CAT_DEBUG_OBJECT (GST_CAT_QOS, trans, "enabled: %d", enabled);
|
|
|
|
GST_OBJECT_LOCK (trans);
|
|
trans->priv->qos_enabled = enabled;
|
|
GST_OBJECT_UNLOCK (trans);
|
|
}
|
|
|
|
/**
|
|
* gst_base_transform_is_qos_enabled:
|
|
* @trans: a #GstBaseTransform
|
|
*
|
|
* Queries if the transform will handle QoS.
|
|
*
|
|
* Returns: TRUE if QoS is enabled.
|
|
*
|
|
* MT safe.
|
|
*
|
|
* Since: 0.10.5
|
|
*/
|
|
gboolean
|
|
gst_base_transform_is_qos_enabled (GstBaseTransform * trans)
|
|
{
|
|
gboolean result;
|
|
|
|
g_return_val_if_fail (GST_IS_BASE_TRANSFORM (trans), FALSE);
|
|
|
|
GST_OBJECT_LOCK (trans);
|
|
result = trans->priv->qos_enabled;
|
|
GST_OBJECT_UNLOCK (trans);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* gst_base_transform_set_gap_aware:
|
|
* @trans: a #GstBaseTransform
|
|
* @gap_aware: New state
|
|
*
|
|
* If @gap_aware is %FALSE (the default), output buffers will have the
|
|
* %GST_BUFFER_FLAG_GAP flag unset.
|
|
*
|
|
* If set to %TRUE, the element must handle output buffers with this flag set
|
|
* correctly, i.e. it can assume that the buffer contains neutral data but must
|
|
* unset the flag if the output is no neutral data.
|
|
*
|
|
* MT safe.
|
|
*
|
|
* Since: 0.10.16
|
|
*/
|
|
void
|
|
gst_base_transform_set_gap_aware (GstBaseTransform * trans, gboolean gap_aware)
|
|
{
|
|
g_return_if_fail (GST_IS_BASE_TRANSFORM (trans));
|
|
|
|
GST_OBJECT_LOCK (trans);
|
|
trans->priv->gap_aware = gap_aware;
|
|
GST_DEBUG_OBJECT (trans, "set gap aware %d", trans->priv->gap_aware);
|
|
GST_OBJECT_UNLOCK (trans);
|
|
}
|
|
|
|
/**
|
|
* gst_base_transform_suggest:
|
|
* @trans: a #GstBaseTransform
|
|
* @caps: caps to suggest
|
|
* @size: buffer size to suggest
|
|
*
|
|
* Instructs @trans to suggest new @caps upstream. A copy of @caps will be
|
|
* taken.
|
|
*
|
|
* Since: 0.10.21
|
|
*/
|
|
void
|
|
gst_base_transform_suggest (GstBaseTransform * trans, GstCaps * caps,
|
|
guint size)
|
|
{
|
|
g_return_if_fail (GST_IS_BASE_TRANSFORM (trans));
|
|
|
|
GST_OBJECT_LOCK (trans->sinkpad);
|
|
if (trans->priv->sink_suggest)
|
|
gst_caps_unref (trans->priv->sink_suggest);
|
|
if (caps)
|
|
caps = gst_caps_copy (caps);
|
|
trans->priv->sink_suggest = caps;
|
|
trans->priv->size_suggest = size;
|
|
trans->priv->suggest_pending = TRUE;
|
|
GST_DEBUG_OBJECT (trans, "new suggest %" GST_PTR_FORMAT, caps);
|
|
GST_OBJECT_UNLOCK (trans->sinkpad);
|
|
}
|
|
|
|
/**
|
|
* gst_base_transform_reconfigure:
|
|
* @trans: a #GstBaseTransform
|
|
*
|
|
* Instructs @trans to renegotiate a new downstream transform on the next
|
|
* buffer. This function is typically called after properties on the transform
|
|
* were set that influence the output format.
|
|
*
|
|
* Since: 0.10.21
|
|
*/
|
|
void
|
|
gst_base_transform_reconfigure (GstBaseTransform * trans)
|
|
{
|
|
g_return_if_fail (GST_IS_BASE_TRANSFORM (trans));
|
|
|
|
GST_OBJECT_LOCK (trans);
|
|
GST_DEBUG_OBJECT (trans, "marking reconfigure");
|
|
trans->priv->reconfigure = TRUE;
|
|
gst_caps_replace (&trans->priv->sink_alloc, NULL);
|
|
GST_OBJECT_UNLOCK (trans);
|
|
}
|